AI-generatedGrimsby at a glance
- Best time
- May, Jul – Aug
- Warmest month
- Aug · 20°
- Warmest sea
- Aug · 14.9°
- Sunshine a year
- 1,740 h
- Rain a year
- 680 mm
- Climate
- Maritime
- Time zone
- UTC+0 / UTC+1
- Elevation
- 4 m
Climate in Grimsby
Grimsby has a maritime climate with moderate summers and cool, often grey winters. August is the warmest month with average highs of 20 °C, while January is the coolest at 7 °C. With around 1,740 hours of sunshine a year, Grimsby is moderately sunny; May is the sunniest month with 7.3 hours a day.
Holiday weather through the year
Weather in October
Holiday weather in October
Poor
Best time to visit: May, July – August
A typical day in October
- Morning, 08:00: about 9°
- Midday, 13:00: about 14°
- Afternoon, 16:00: about 14°
- Evening, 20:00: about 12°
- Night, 23:00: about 11°
07:2518:07
Cool evenings: pack a jumper or a jacket.
Estimated from the average high and low: coolest around sunrise, warmest in mid-afternoon.
Light for photos in October
- Golden hour
- Morning 07:04–08:14 · evening 17:18–18:28
- Blue hour
- Morning 06:50–07:04 · evening 18:28–18:42
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 Grimsby in October?
In October, Grimsby is cool: daytime highs average 14 °C, and nights cool down to about 9 °C. The sea averages 12.8 °C – swimming is only for the hardy. The sun is scarce, with only about 4 hours a day. Rain is frequent, with about 12 rainy days and 65 mm in total. All in all, October is not an ideal month for a holiday in Grimsby.
More details for October
- Daylight
- 10 h 41 min07:25 – 18:07
- UV index
- 2 · lowclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 27 km/haverage daily peakAll months
- Cloud cover
- 70 %on averageAll months
- Hot days
- 0 days30 °C or more
- Snow days
- 0 days1 cm or more of fresh snow
- Time zone
- UTC+1Europe/London
How the score comes together
- Temperatureweight 35 %0 %
- Seaweight 25 %0 %
- Sunshineweight 20 %12 %
- Few rainy daysweight 20 %45 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in October
- A jumper for the evenings
- Rain jacket or umbrella
Sea temperature in Grimsby
Monthly sea surface temperature with the range of cooler and warmer years.
8 in 10 years: 12.2 – 13.5 °C
Swimming season: Never above 20 °C
- cold
- fresh
- refreshing
- pleasant
- warm
- very warm
The sea temperature in Grimsby ranges from 6.2 °C in February to 14.9 °C in August. Even at its warmest the sea stays below 20 °C, so swimming is bracing at best.
From November to December 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 14.1 and 15.6 °C.
| Month | Average | Cool year | Warm year | Feels |
|---|---|---|---|---|
| JanuaryJan | 6.8° | 6.1° | 7.7° | cold |
| FebruaryFeb | 6.2° | 5.4° | 7.0° | cold |
| MarchMar | 6.4° | 5.2° | 7.2° | cold |
| AprilApr | 7.7° | 6.6° | 8.6° | cold |
| MayMay | 9.7° | 8.8° | 10.8° | cold |
| JuneJun | 11.8° | 10.9° | 12.9° | cold |
| JulyJul | 13.9° | 13.1° | 15.0° | cold |
| AugustAug | 14.9° | 14.1° | 15.6° | cold |
| SeptemberSep | 14.3° | 13.4° | 15.5° | cold |
| OctoberOct | 12.8° | 12.2° | 13.5° | cold |
| NovemberNov | 10.6° | 10.0° | 11.5° | cold |
| DecemberDec | 8.4° | 7.4° | 9.1° | cold |
Sunshine hours in Grimsby
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 3.7 of 10.7 hours of daylight in Grimsby, 35 % 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 Grimsby
How strong the sun is at noon, month by month, and how quickly unprotected skin burns.
- Clear-sky UV in October
- 2 · lowLittle protection needed; sunglasses on bright days.
The sun is strongest in June (UV 7).
Minutes until sunburn in October
- Very fair skin
- about 80 min
- Fair skin
- about 105 min
- Light brown skin
- over 2 h
- Olive skin
- over 2 h
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 Grimsby: 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, Grimsby has about 12 rainy days with 65 mm of rain in total.
Wind and clouds in Grimsby
How breezy and how cloudy Grimsby 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 Grimsby typically peaks at 27 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, and here it gets there all year.
Clouds
Average share of the sky covered by cloud, day and night.
In October, cloud covers on average 70 % of the sky over Grimsby: mostly cloudy, with about 3.7 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.
Climate through the year
Long-term monthly averages. Tap a month to see its details.
Nights and sleep in Grimsby
How warm the nights get in each month, from the mean night-time low. Tap a month for details.
- Cold 0–8°
- Cool 8–15°
CoolOctober: nights around 9°. A duvet at night and a jumper for the evening.
The coolest nights are in January (2°), the warmest in August (13°). 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 | 10 | 7° | 2° | 6.8° | 2.1 h | 11 | 50 |
| FebruaryFeb | 12 | 8° | 3° | 6.2° | 3.2 h | 10 | 44 |
| MarchMar | 15 | 10° | 3° | 6.4° | 4.3 h | 11 | 44 |
| AprilApr | 20 | 12° | 5° | 7.7° | 6.1 h | 11 | 46 |
| MayMay | 23 | 15° | 8° | 9.7° | 7.3 h | 12 | 57 |
| JuneJun | 21 | 18° | 11° | 11.8° | 6.8 h | 12 | 68 |
| JulyJul | 26 | 20° | 13° | 13.9° | 7.1 h | 14 | 75 |
| AugustAug | 27 | 20° | 13° | 14.9° | 6.8 h | 12 | 67 |
| SeptemberSep | 20 | 18° | 11° | 14.3° | 5.4 h | 10 | 53 |
| OctoberOct | 11 | 14° | 9° | 12.8° | 3.7 h | 12 | 65 |
| NovemberNov | 8 | 10° | 5° | 10.6° | 2.5 h | 12 | 57 |
| DecemberDec | 9 | 7° | 3° | 8.4° | 1.9 h | 12 | 55 |
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
53.57° N, 0.08° W · 4 m · Europe/London
Best time to visit Grimsby
The best time to visit Grimsby is in May and from July to August. The sea stays too cool for a classic beach holiday: even in August it only reaches 14.9 °C. For sightseeing, day trips and hiking, conditions are most comfortable in June and in September. Rain is most frequent from June to August and in November; the wettest month is July with 75 mm.
Grimsby through the seasons
How the weather changes over the seasons, with averages for each.
Grimsby in spring
Mar – May
Poor
- 10–15 °C by day
- Sea 8 °C
- 6 h of sun a day
- 34 rainy days in all
Grimsby in summer
Jun – Aug
Poor
- 18–20 °C by day
- Sea 14 °C
- 7 h of sun a day
- 38 rainy days in all
Grimsby in autumn
Sep – Nov
Poor
- 10–18 °C by day
- Sea 13 °C
- 4 h of sun a day
- 34 rainy days in all
Grimsby in winter
Dec – Feb
Poor
- 7–8 °C by day
- Sea 7 °C
- 2 h of sun a day
- 33 rainy days in all
Find your perfect month
Tell us what you like and we rate every month in Grimsby for you.
Your best months: May, July – August
Based on the climate averages; tap a month to see its details.
Compare two months in Grimsby
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 Grimsby: score 27 against 11. In August, days are 6 °C warmer than in October. The sea is 2 °C warmer in August. The sun shines 3 hours longer a day in August.
| Month | October | August |
|---|---|---|
| Weather score | 11 | 27better |
| Day high | 14° | 20° |
| Night low | 9° | 13° |
| Sea | 12.8° | 14.9° |
| Sunshine | 3.7 h | 6.8 hbetter |
| Rainy days | 12 | 12 |
| Rainfall | 65 mm | 67 mm |
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
Rainy months
Jun – Aug, Nov
12 or more rainy days
Grimsby month by month
The typical weather for every month at a glance.
10January7° · Sea 7° · 2 h
In January, Grimsby is cold: daytime highs average 7 °C, and nights cool down to about 2 °C. The sea averages 6.8 °C – swimming is only for the hardy. The sun is scarce, with only about 2 hours a day. Rain is frequent, with about 11 rainy days and 50 mm in total. All in all, January is not an ideal month for a holiday in Grimsby.
Grimsby in January12February8° · Sea 6° · 3 h
In February, Grimsby is cold: daytime highs average 8 °C, and nights cool down to about 3 °C. The sea averages 6.2 °C – swimming is only for the hardy. The sun is scarce, with only about 3 hours a day. Rain is frequent, with about 10 rainy days and 44 mm in total. It is often windy, with gusts of around 29 km/h. All in all, February is not an ideal month for a holiday in Grimsby.
Grimsby in February15March10° · Sea 6° · 4 h
In March, Grimsby is cold: daytime highs average 10 °C, and nights cool down to about 3 °C. The sea averages 6.4 °C – swimming is only for the hardy. Expect around 4 hours of sunshine a day. Rain is frequent, with about 11 rainy days and 44 mm in total. All in all, March is not an ideal month for a holiday in Grimsby.
Grimsby in March20April12° · Sea 8° · 6 h
In April, Grimsby is cool: daytime highs average 12 °C, and nights cool down to about 5 °C. The sea averages 7.7 °C – swimming is only for the hardy. Expect around 6 hours of sunshine a day. Rain is frequent, with about 11 rainy days and 46 mm in total. All in all, April is not an ideal month for a holiday in Grimsby.
Grimsby in April23May15° · Sea 10° · 7 h
In May, Grimsby is cool: daytime highs average 15 °C, and nights cool down to about 8 °C. The sea averages 9.7 °C – swimming is only for the hardy. The sun shines for around 7 hours a day. Rain is frequent, with about 12 rainy days and 57 mm in total. All in all, May is not an ideal month for a holiday in Grimsby.
Grimsby in May21June18° · Sea 12° · 7 h
In June, Grimsby is mild: daytime highs average 18 °C, and nights cool down to about 11 °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 12 rainy days and 68 mm in total. All in all, June is not an ideal month for a holiday in Grimsby.
Grimsby in June26July20° · Sea 14° · 7 h
In July, Grimsby is mild: daytime highs average 20 °C, and nights cool down to about 13 °C. The sea averages 13.9 °C – swimming is only for the hardy. The sun shines for around 7 hours a day. Rain is frequent, with about 14 rainy days and 75 mm in total. All in all, July is not an ideal month for a holiday in Grimsby.
Grimsby in July27August20° · Sea 15° · 7 h
In August, Grimsby is mild: daytime highs average 20 °C, and nights cool down to about 13 °C. The sea averages 14.9 °C – swimming is only for the hardy. The sun shines for around 7 hours a day. Rain is frequent, with about 12 rainy days and 67 mm in total. All in all, August is not an ideal month for a holiday in Grimsby.
Grimsby in August20September18° · Sea 14° · 5 h
In September, Grimsby is mild: daytime highs average 18 °C, and nights cool down to about 11 °C. The sea averages 14.3 °C – swimming is only for the hardy. Expect around 5 hours of sunshine a day. Rain is frequent, with about 10 rainy days and 53 mm in total. All in all, September is not an ideal month for a holiday in Grimsby.
Grimsby in September11October14° · Sea 13° · 4 h
In October, Grimsby is cool: daytime highs average 14 °C, and nights cool down to about 9 °C. The sea averages 12.8 °C – swimming is only for the hardy. The sun is scarce, with only about 4 hours a day. Rain is frequent, with about 12 rainy days and 65 mm in total. All in all, October is not an ideal month for a holiday in Grimsby.
Grimsby in October8November10° · Sea 11° · 3 h
In November, Grimsby is cold: daytime highs average 10 °C, and nights cool down to about 5 °C. The sea averages 10.6 °C – swimming is only for the hardy. The sun is scarce, with only about 3 hours a day. Rain is frequent, with about 12 rainy days and 57 mm in total. All in all, November is not an ideal month for a holiday in Grimsby.
Grimsby in November9December7° · Sea 8° · 2 h
In December, Grimsby is cold: daytime highs average 7 °C, and nights cool down to about 3 °C. The sea averages 8.4 °C – swimming is only for the hardy. The sun is scarce, with only about 2 hours a day. Rain is frequent, with about 12 rainy days and 55 mm in total. All in all, December is not an ideal month for a holiday in Grimsby.
Grimsby in DecemberGrimsby compared
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Grimsby vs. Kingston upon Hull
In October the holiday weather in Grimsby and Kingston upon Hull is about equally good (score 11 vs. 10). During the day it is about as warm in Kingston upon Hull as in Grimsby. The sea is about equally warm.
| in October | Grimsby | Kingston upon Hull |
|---|---|---|
| Holiday score | 11 | 10 |
| Daytime high | 14° | 14° |
| Sea | 13° | 13° |
| Sunshine | 4 h | 4 h |
| Rainy days | 12 | 13 |
| Best time | May, Jul – Aug | May – Sep |
Through the year
United Kingdom in October: the best places
In October, Grimsby ranks 26 among the 31 nearest destinations in this country.
- Cambridge15°51
- 2Peterborough15°49
- 3Lincoln14°47
- 4Norwich15°47
- 5Northampton14°46
- 6Milton Keynes14°46
- 7Nottingham14°45
- 8Leicester14°45
- 26GrimsbyThis page14°13°11
Planning a trip to Grimsby
Weather for your travel dates
Pick your arrival and length of stay, and we sum up the weather to expect.
Grimsby 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.
Grimsby has its best school-holiday weather during the summer holidays (score 27) and its weakest during the Christmas holidays (score 10).
- 19
Easter holidays
Mar – Apr
Poor
- 11 °C by day
- Sea 7 °C
- 5.6 h of sun a day
- 11 rainy days a month
- 23
May half-term
May – Jun
Poor
- 15 °C by day
- Sea 10 °C
- 7.2 h of sun a day
- 12 rainy days a month
- 27
Summer holidays
Jul – Aug
PoorBest holidays
- 20 °C by day
- Sea 15 °C
- 6.9 h of sun a day
- 13 rainy days a month
Keep in mind: Frequent rain
- 11
October half-term
Oct
Poor
- 14 °C by day
- Sea 13 °C
- 3.7 h of sun a day
- 12 rainy days a month
- 10
Christmas holidays
Dec – Jan
Poor
- 7 °C by day
- Sea 8 °C
- 2.0 h of sun a day
- 11 rainy days a month
Based on the climate averages 1996–2025.
Getting there
Flying from
- Nonstop flight
- Short trip – train or car is often quicker
- Distance
- 230 km
- Time zone
- UTC+1
- Jet lag
- Hardly any (under 3 h)
Estimated from the straight-line distance: 30 minutes for take-off and landing plus 830 km/h cruising speed.
Frequently asked questions about Grimsby
When is the best time to visit Grimsby?
The best time to visit Grimsby is in May and from July to August. That is when the holiday weather score, which combines temperature, sea, sunshine and rain, is highest.
How warm is the sea in Grimsby?
The sea temperature in Grimsby ranges from 6.2 °C in February to 14.9 °C in August. Even at its warmest the sea stays below 20 °C, so swimming is bracing at best.
Can you swim in Grimsby in October?
Only if you don't mind cold water: in October the sea averages just 12.8 °C. Comfortable swimming temperatures are not reached at any time of year.
What is the warmest month in Grimsby?
August is the warmest month, with average highs of 20 °C and nights around 13 °C. January is the coolest month at 7 °C.
When does it rain most in Grimsby?
Rain is most frequent from June to August and in November; the wettest month is July with 75 mm. The driest month is March with 44 mm.
How many hours of sunshine does Grimsby get?
Grimsby gets around 1,740 hours of sunshine a year. The sunniest month is May with 7.3 hours a day; in December there are 1.9 hours a day.
What time zone is Grimsby in?
Grimsby uses the time zone Europe/London: UTC+0 in January and UTC+1 in July.
Which school holidays are best for Grimsby?
Grimsby has its best school-holiday weather during the summer holidays (score 27) and its weakest during the Christmas holidays (score 10). Holiday ratings (0–100): Easter holidays 19, May half-term 23, Summer holidays 27, October half-term 11, Christmas holidays 10.
Near Grimsby
Other destinations close by.
Places with a climate like Grimsby
Destinations whose weather through the year is closest to Grimsby's – good alternatives.