AI-generatedBar Harbor (Acadia) at a glance
- Best time
- Jun – Sep
- Warmest month
- Aug · 20°
- Warmest sea
- Aug · 13.1°
- Sunshine a year
- 2,110 h
- Rain a year
- 1,138 mm
- Climate
- Continental
- Time zone
- UTC−5 / UTC−4
- Elevation
- 18 m
Climate in Bar Harbor (Acadia)
Bar Harbor (Acadia) has warm to hot summers and cold winters with occasional snow. August is the warmest month with average highs of 20 °C, while January is the coolest at 0 °C. With around 2,110 hours of sunshine a year, Bar Harbor (Acadia) is moderately sunny; July is the sunniest month with 7.4 hours a day.
Holiday weather through the year
Weather in October
Holiday weather in October
Fair
Best time to visit: June – September
A typical day in October
- Morning, 08:00: about 10°
- Midday, 13:00: about 13°
- Afternoon, 16:00: about 12°
- Evening, 20:00: about 11°
- Night, 23:00: about 10°
06:4617:51
Cold evenings: bring a warm jacket.
Estimated from the average high and low: coolest around sunrise, warmest in mid-afternoon.
Light for photos in October
- Golden hour
- Morning 06:28–07:26 · evening 17:11–18:09
- Blue hour
- Morning 06:17–06:28 · evening 18:09–18:20
Golden hour: the sun between 4° below and 6° above the horizon; blue hour: 6° to 4° below it. Times for the 15th of the month; mountains and clouds shift the light.
What is the weather like in Bar Harbor (Acadia) in October?
In October, Bar Harbor (Acadia) is cool: daytime highs average 13 °C, and nights cool down to about 9 °C. The sea averages 11.6 °C – swimming is only for the hardy. Expect around 5 hours of sunshine a day. Rain is frequent, with about 10 rainy days and 116 mm in total. All in all, October is a so-so month for a holiday in Bar Harbor (Acadia).
More details for October
- Daylight
- 11 h 4 min06:46 – 17:51
- UV index
- 3 · moderateclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 23 km/haverage daily peakAll months
- Cloud cover
- 57 %on averageAll months
- Hot days
- 0 days30 °C or more
- Snow days
- 0 days1 cm or more of fresh snowAll months
- Time zone
- UTC−4America/New_York
How the score comes together
- Temperatureweight 50 %53 %
- Sunshineweight 20 %35 %
- Few rainy daysweight 30 %59 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Nature escape”.
What to pack in October
- Sunscreen
- A jumper for the evenings
- Rain jacket or umbrella
Sea temperature in Bar Harbor (Acadia)
Monthly sea surface temperature with the range of cooler and warmer years.
8 in 10 years: 10.6 – 12.7 °C
Swimming season: Never above 20 °C
- cold
- fresh
- refreshing
- pleasant
- warm
- very warm
The sea temperature in Bar Harbor (Acadia) ranges from 3.5 °C in March to 13.1 °C in August. Even at its warmest the sea stays below 20 °C, so swimming is bracing at best.
From November to March the sea is even warmer than the afternoon air. The sea temperature varies from year to year: in August, eight out of ten years were between 11.9 and 14.4 °C.
| Month | Average | Cool year | Warm year | Feels |
|---|---|---|---|---|
| JanuaryJan | 5.7° | 4.6° | 6.8° | cold |
| FebruaryFeb | 4.1° | 3.0° | 5.2° | cold |
| MarchMar | 3.5° | 2.5° | 4.4° | cold |
| AprilApr | 4.6° | 3.7° | 5.7° | cold |
| MayMay | 6.8° | 5.6° | 7.9° | cold |
| JuneJun | 9.4° | 8.3° | 10.4° | cold |
| JulyJul | 11.8° | 10.4° | 13.2° | cold |
| AugustAug | 13.1° | 11.9° | 14.4° | cold |
| SeptemberSep | 12.8° | 11.7° | 13.7° | cold |
| OctoberOct | 11.6° | 10.6° | 12.7° | cold |
| NovemberNov | 9.9° | 8.7° | 11.0° | cold |
| DecemberDec | 7.8° | 6.6° | 8.7° | cold |
Sunshine hours in Bar Harbor (Acadia)
Average hours of bright sunshine per day, next to the length of the day. Tap a month to select it.
In October, the sun shines for about 5.1 of 11.1 hours of daylight in Bar Harbor (Acadia), 46 % of the day.
Sunshine hours: estimated from radiation data (ERA5, 1996–2025) and calibrated against measured station values; no weather station is close enough here. Daylight is the time from sunrise to sunset on the 15th of the month.
UV index in Bar Harbor (Acadia)
How strong the sun is at noon, month by month, and how quickly unprotected skin burns.
- Clear-sky UV in October
- 3 · moderateAround midday seek shade; use sunscreen, a hat and sunglasses.
The sun is strongest in June (UV 9).
Minutes until sunburn in October
- Very fair skin
- about 40 min
- Fair skin
- about 55 min
- Light brown skin
- about 75 min
- Olive skin
- about 95 min
Rough guide for unprotected skin at noon under a clear sky; clouds lengthen it, water, sand and snow shorten it. Sunscreen extends the time only partly.
Monthly values: clear-sky noon estimate from the sun's angle, ozone and altitude. UV today: Open-Meteo forecast.
Rain in Bar Harbor (Acadia): rainy days and rainfall
A rainy day is a day with at least 1 mm of rain or snow; the amount is what falls in the whole month. Tap a month to select it.
In October, Bar Harbor (Acadia) has about 10 rainy days with 116 mm of rain in total.
Wind and clouds in Bar Harbor (Acadia)
How breezy and how cloudy Bar Harbor (Acadia) is through the year. Tap a month to select it on the whole page.
Wind
Typical daily peak of the wind in km/h: what the afternoon breeze usually reaches, not the gusts.
In October, the wind in Bar Harbor (Acadia) typically peaks at 23 km/h during the day: Beaufort 4, moderate breeze.
Breezy months for windsurfing and kiting
From Beaufort 4 (20 km/h) the daily breeze is usually enough for windsurfing and often for kiting: Sep – Jun.
Clouds
Average share of the sky covered by cloud, day and night.
In October, cloud covers on average 57 % of the sky over Bar Harbor (Acadia): variable cloud, with about 5.1 hours of sunshine a day.
Wind: mean daily maximum of the hourly wind 10 m above ground (ERA5, 1996–2025). Gusts are stronger, and the model grid of about 28 km smooths out local effects such as capes and valley winds. Clouds: mean total cloud cover of all layers over day and night (ERA5, 1996–2025). Thin high cloud counts as cover even when the sun still shines through.
Snow in Bar Harbor (Acadia)
When Bar Harbor (Acadia) is likely to be white: the chance of seeing snow during a week's stay, the days with fresh snow and how much falls. Tap a month to select it.
Snow calendar
- hardly any
- possible
- likely
- very likely
In October, it hardly ever snows in Bar Harbor (Acadia).
Snow days bring at least 1 cm of fresh snow. Fresh snow comes from ERA5 snowfall (1996–2025) at the height of the place, not on the slopes above it; the snow chance also weighs whether the snow settles. An estimate from climate averages, not a snow report.
Climate through the year
Long-term monthly averages. Tap a month to see its details.
Nights and sleep in Bar Harbor (Acadia)
How warm the nights get in each month, from the mean night-time low. Tap a month for details.
- Frost below 0°
- Cold 0–8°
- Cool 8–15°
- Pleasant 15–20°
CoolOctober: nights around 9°. A duvet at night and a jumper for the evening.
The coolest nights are in January (−7°), the warmest in August (16°). Nights are pleasant for sleeping (15 to 20 °C) from July to August. Nights fall below 8 °C on average from November to April, so the room should be heated.
Temperatures through the year
Average daytime high, night-time low and sea temperature per month.
| Month | Score | Day | Night | Sea | Sun | Rain days | Rain mm |
|---|---|---|---|---|---|---|---|
| JanuaryJan | 20 | 0° | −7° | 5.7° | 4.3 h | 11 | 99 |
| FebruaryFeb | 25 | 1° | −7° | 4.1° | 5.0 h | 10 | 84 |
| MarchMar | 24 | 3° | −3° | 3.5° | 5.8 h | 11 | 102 |
| AprilApr | 26 | 8° | 3° | 4.6° | 6.3 h | 11 | 96 |
| MayMay | 56 | 13° | 8° | 6.8° | 6.9 h | 11 | 82 |
| JuneJun | 80 | 17° | 12° | 9.4° | 7.0 h | 10 | 88 |
| JulyJul | 83 | 20° | 16° | 11.8° | 7.4 h | 10 | 72 |
| AugustAug | 84 | 20° | 16° | 13.1° | 7.1 h | 8 | 75 |
| SeptemberSep | 83 | 18° | 14° | 12.8° | 6.4 h | 8 | 96 |
| OctoberOct | 51 | 13° | 9° | 11.6° | 5.1 h | 10 | 116 |
| NovemberNov | 21 | 8° | 3° | 9.9° | 4.2 h | 10 | 103 |
| DecemberDec | 16 | 3° | −3° | 7.8° | 3.8 h | 12 | 123 |
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences
44.39° N, 68.20° W · 18 m · America/New_York
Best time to visit Bar Harbor (Acadia)
The best time to visit Bar Harbor (Acadia) is from June to September. The sea stays too cool for a classic beach holiday: even in August it only reaches 13.1 °C. For sightseeing, day trips and hiking, conditions are most comfortable from June to September. The wettest month is December with 123 mm of precipitation.
Bar Harbor (Acadia) through the seasons
How the weather changes over the seasons, with averages for each.
Bar Harbor (Acadia) in spring
Mar – May
Poor
- 3–13 °C by day
- Sea 5 °C
- 6 h of sun a day
- 33 rainy days in all
Bar Harbor (Acadia) in summer
Jun – Aug
Excellent
- 17–20 °C by day
- Sea 11 °C
- 7 h of sun a day
- 28 rainy days in all
Bar Harbor (Acadia) in autumn
Sep – Nov
Fair
- 8–18 °C by day
- Sea 11 °C
- 5 h of sun a day
- 28 rainy days in all
Bar Harbor (Acadia) in winter
Dec – Feb
Poor
- 0–3 °C by day
- Sea 6 °C
- 4 h of sun a day
- 32 rainy days in all
Find your perfect month
Tell us what you like and we rate every month in Bar Harbor (Acadia) for you.
Your best months: July – August
Based on the climate averages; tap a month to see its details.
Compare two months in Bar Harbor (Acadia)
Pick two months to see how the weather differs. A tick marks the clearly better value; for temperatures it depends on your plans.
August has the better holiday weather in Bar Harbor (Acadia): score 84 against 51. In August, days are 7 °C warmer than in October. The sea is 2 °C warmer in August. August has 2 fewer rainy days. The sun shines 2 hours longer a day in August.
| Month | October | August |
|---|---|---|
| Weather score | 51 | 84better |
| Day high | 13° | 20° |
| Night low | 9° | 16° |
| Sea | 11.6° | 13.1° |
| Sunshine | 5.1 h | 7.1 hbetter |
| Rainy days | 10 | 8better |
| Rainfall | 116 mm | 75 mmbetter |
| Muggy days | 0better | 2 |
Based on the climate averages 1996–2025.
Which month for what?
Beach & swimming
No month
Sea from 21 °C, warm and mostly dry
Sightseeing & hiking
Jun – Sep
15–28 °C and not too much rain
Snow
Dec – Apr
Snow on 2 or more days
Bar Harbor (Acadia) month by month
The typical weather for every month at a glance.
20January0° · Sea 6° · 4 h
In January, Bar Harbor (Acadia) is freezing cold: daytime highs average 0 °C, and nights often drop below freezing (−7 °C). The sea averages 5.7 °C – swimming is only for the hardy. Expect around 4 hours of sunshine a day. Precipitation, often as snow, falls on about 11 days, totalling 99 mm. Snow falls on about 7 days. All in all, January is not an ideal month for a holiday in Bar Harbor (Acadia).
Bar Harbor (Acadia) in January25February1° · Sea 4° · 5 h
In February, Bar Harbor (Acadia) is freezing cold: daytime highs average 1 °C, and nights often drop below freezing (−7 °C). The sea averages 4.1 °C – swimming is only for the hardy. Expect around 5 hours of sunshine a day. Precipitation, often as snow, falls on about 10 days, totalling 84 mm. Snow falls on about 6 days. All in all, February is not an ideal month for a holiday in Bar Harbor (Acadia).
Bar Harbor (Acadia) in February24March3° · Sea 4° · 6 h
In March, Bar Harbor (Acadia) is cold: daytime highs average 3 °C, and nights often drop below freezing (−3 °C). The sea averages 3.5 °C – swimming is only for the hardy. Expect around 6 hours of sunshine a day. Precipitation, often as snow, falls on about 11 days, totalling 102 mm. Snow falls on about 5 days. All in all, March is not an ideal month for a holiday in Bar Harbor (Acadia).
Bar Harbor (Acadia) in March26April8° · Sea 5° · 6 h
In April, Bar Harbor (Acadia) is cold: daytime highs average 8 °C, and nights cool down to about 3 °C. The sea averages 4.6 °C – swimming is only for the hardy. Expect around 6 hours of sunshine a day. Rain is frequent, with about 11 rainy days and 96 mm in total. Snow falls on about 2 days. All in all, April is not an ideal month for a holiday in Bar Harbor (Acadia).
Bar Harbor (Acadia) in April56May13° · Sea 7° · 7 h
In May, Bar Harbor (Acadia) is cool: daytime highs average 13 °C, and nights cool down to about 8 °C. The sea averages 6.8 °C – swimming is only for the hardy. The sun shines for around 7 hours a day. Rain is frequent, with about 11 rainy days and 82 mm in total. All in all, May is a so-so month for a holiday in Bar Harbor (Acadia).
Bar Harbor (Acadia) in May80June17° · Sea 9° · 7 h
In June, Bar Harbor (Acadia) is mild: daytime highs average 17 °C, and nights cool down to about 12 °C. The sea averages 9.4 °C – swimming is only for the hardy. The sun shines for around 7 hours a day. Rain is frequent, with about 10 rainy days and 88 mm in total. All in all, June is an excellent month for a holiday in Bar Harbor (Acadia).
Bar Harbor (Acadia) in June83July20° · Sea 12° · 7 h
In July, Bar Harbor (Acadia) is mild: daytime highs average 20 °C, and nights cool down to about 16 °C. The sea averages 11.8 °C – swimming is only for the hardy. The sun shines for around 7 hours a day. Rain is frequent, with about 10 rainy days and 72 mm in total. All in all, July is an excellent month for a holiday in Bar Harbor (Acadia).
Bar Harbor (Acadia) in July84August20° · Sea 13° · 7 h
In August, Bar Harbor (Acadia) is mild: daytime highs average 20 °C, and nights cool down to about 16 °C. The sea averages 13.1 °C – swimming is only for the hardy. The sun shines for around 7 hours a day. Rain falls on about 8 days, adding up to 75 mm. All in all, August is an excellent month for a holiday in Bar Harbor (Acadia).
Bar Harbor (Acadia) in August83September18° · Sea 13° · 6 h
In September, Bar Harbor (Acadia) is mild: daytime highs average 18 °C, and nights cool down to about 14 °C. The sea averages 12.8 °C – swimming is only for the hardy. Expect around 6 hours of sunshine a day. Rain falls on about 8 days, adding up to 96 mm. All in all, September is an excellent month for a holiday in Bar Harbor (Acadia).
Bar Harbor (Acadia) in September51October13° · Sea 12° · 5 h
In October, Bar Harbor (Acadia) is cool: daytime highs average 13 °C, and nights cool down to about 9 °C. The sea averages 11.6 °C – swimming is only for the hardy. Expect around 5 hours of sunshine a day. Rain is frequent, with about 10 rainy days and 116 mm in total. All in all, October is a so-so month for a holiday in Bar Harbor (Acadia).
Bar Harbor (Acadia) in October21November8° · Sea 10° · 4 h
In November, Bar Harbor (Acadia) is cold: daytime highs average 8 °C, and nights cool down to about 3 °C. The sea averages 9.9 °C – swimming is only for the hardy. Expect around 4 hours of sunshine a day. Rain is frequent, with about 10 rainy days and 103 mm in total. All in all, November is not an ideal month for a holiday in Bar Harbor (Acadia).
Bar Harbor (Acadia) in November16December3° · Sea 8° · 4 h
In December, Bar Harbor (Acadia) is cold: daytime highs average 3 °C, and nights often drop below freezing (−3 °C). The sea averages 7.8 °C – swimming is only for the hardy. The sun is scarce, with only about 4 hours a day. Precipitation, often as snow, falls on about 12 days, totalling 123 mm. Snow falls on about 5 days. All in all, December is not an ideal month for a holiday in Bar Harbor (Acadia).
Bar Harbor (Acadia) in DecemberBar Harbor (Acadia) compared
Put Bar Harbor (Acadia) side by side with another destination.
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Bar Harbor (Acadia) vs. Portland
In October Portland has the better holiday weather (score 57 vs. 51). During the day Portland is 1 °C warmer than Bar Harbor (Acadia). The sea in Portland is 1 °C warmer.
| in October | Bar Harbor (Acadia) | Portland |
|---|---|---|
| Holiday score | 51 | 57 |
| Daytime high | 13° | 14° |
| Sea | 12° | 13° |
| Sunshine | 5 h | 5 h |
| Rainy days | 10 | 10 |
| Best time | Jun – Sep | Jul – Aug |
Through the year
USA in October: the best places
In October, Bar Harbor (Acadia) ranks 14 among the 31 nearest destinations in this country.
- Raleigh22°84
- 2Richmond21°82
- 3Washington20°19°81
- 4Philadelphia19°18°79
- 5Baltimore19°18°79
- 6New York18°18°77
- 7Providence17°17°70
- 8Pittsburgh18°69
- 14Bar Harbor (Acadia)This page13°12°51
Planning a trip to Bar Harbor (Acadia)
Weather for your travel dates
Pick your arrival and length of stay, and we sum up the weather to expect.
Bar Harbor (Acadia) in the school holidays
How the weather suits the usual holiday periods. Dates vary by school and region, so each holiday uses the months it usually falls in.
Bar Harbor (Acadia) has its best school-holiday weather during the summer holidays (score 84) and its weakest during the Christmas holidays (score 18).
- 25
Easter holidays
Mar – Apr
Poor
- 7 °C by day
- Sea 4 °C
- 6.1 h of sun a day
- 11 rainy days a month
Keep in mind: Snow
- 61
May half-term
May – Jun
Good
- 14 °C by day
- Sea 7 °C
- 6.9 h of sun a day
- 11 rainy days a month
- 84
Summer holidays
Jul – Aug
ExcellentBest holidays
- 20 °C by day
- Sea 13 °C
- 7.2 h of sun a day
- 9 rainy days a month
Good for: Sightseeing & walks
- 51
October half-term
Oct
Fair
- 13 °C by day
- Sea 12 °C
- 5.1 h of sun a day
- 10 rainy days a month
- 18
Christmas holidays
Dec – Jan
Poor
- 1 °C by day
- Sea 7 °C
- 4.1 h of sun a day
- 11 rainy days a month
Keep in mind: Snow
Based on the climate averages 1996–2025.
Getting there
Flying from
- Nonstop flight
- about 6 h 25 min
- Distance
- 4,930 km
- Time zone
- UTC−4
- Jet lag
- About 3 days (5 h west)
Rule of thumb for flying west: for a few days before, stay up a little later, and get afternoon and evening light at your destination.
Estimated from the straight-line distance: 30 minutes for take-off and landing plus 830 km/h cruising speed.
Frequently asked questions about Bar Harbor (Acadia)
When is the best time to visit Bar Harbor (Acadia)?
The best time to visit Bar Harbor (Acadia) is from June to September. That is when the holiday weather score, which combines temperature, sea, sunshine and rain, is highest.
How warm is the sea in Bar Harbor (Acadia)?
The sea temperature in Bar Harbor (Acadia) ranges from 3.5 °C in March to 13.1 °C in August. Even at its warmest the sea stays below 20 °C, so swimming is bracing at best.
Can you swim in Bar Harbor (Acadia) in October?
Only if you don't mind cold water: in October the sea averages just 11.6 °C. Comfortable swimming temperatures are not reached at any time of year.
What is the warmest month in Bar Harbor (Acadia)?
August is the warmest month, with average highs of 20 °C and nights around 16 °C. January is the coolest month at 0 °C.
When does it rain most in Bar Harbor (Acadia)?
The wettest month is December with 123 mm of precipitation. The driest month is July with 72 mm.
How many hours of sunshine does Bar Harbor (Acadia) get?
Bar Harbor (Acadia) gets around 2,110 hours of sunshine a year. The sunniest month is July with 7.4 hours a day; in December there are 3.8 hours a day.
What time zone is Bar Harbor (Acadia) in?
Bar Harbor (Acadia) uses the time zone America/New_York: UTC−5 in January and UTC−4 in July.
How long is the flight from London to Bar Harbor (Acadia)?
A nonstop flight from London to Bar Harbor (Acadia) takes about 6 h 25 min, for a straight-line distance of about 4,930 km.
Which school holidays are best for Bar Harbor (Acadia)?
Bar Harbor (Acadia) has its best school-holiday weather during the summer holidays (score 84) and its weakest during the Christmas holidays (score 18). Holiday ratings (0–100): Easter holidays 25, May half-term 61, Summer holidays 84, October half-term 51, Christmas holidays 18.
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