AI-generatedSwansea at a glance
- Best time
- Jun – Sep
- Warmest month
- Jul · 19°
- Warmest sea
- Aug · 17.9°
- Sunshine a year
- 1,710 h
- Rain a year
- 1,158 mm
- Climate
- Maritime
- Time zone
- UTC+0 / UTC+1
- Elevation
- 18 m
Climate in Swansea
Swansea has a maritime climate with moderate summers and cool, often grey winters. July is the warmest month with average highs of 19 °C, while January is the coolest at 8 °C. With around 1,710 hours of sunshine a year, Swansea is moderately sunny; June is the sunniest month with 7.2 hours a day.
Holiday weather through the year
Weather in October
Holiday weather in October
Poor
Best time to visit: June – September
Keep in mindFrequent rain
A typical day in October
- Morning, 08:00: about 11°
- Midday, 13:00: about 14°
- Afternoon, 16:00: about 14°
- Evening, 20:00: about 12°
- Night, 23:00: about 12°
07:3818:25
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 07:17–08:24 · evening 17:39–18:46
- Blue hour
- Morning 07:04–07:17 · evening 18:46–18:59
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 Swansea in October?
In October, Swansea is cool: daytime highs average 14 °C, and nights cool down to about 10 °C. The sea averages 15.2 °C – swimming is only for the hardy. The sun is scarce, with only about 4 hours a day. It rains often – on about 16 days, adding up to 131 mm. All in all, October is not an ideal month for a holiday in Swansea.
More details for October
- Daylight
- 10 h 47 min07:38 – 18:25
- UV index
- 2 · lowclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 28 km/haverage daily peakAll months
- Cloud cover
- 73 %on averageAll months
- Hot days
- 0 days30 °C or more
- Time zone
- UTC+1Europe/London
How the score comes together
- Temperatureweight 50 %61 %
- Sunshineweight 20 %10 %
- Few rainy daysweight 30 %11 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in October
- A jumper for the evenings
- Rain jacket or umbrella
Sea temperature in Swansea
Monthly sea surface temperature with the range of cooler and warmer years.
8 in 10 years: 14.7 – 15.8 °C
Swimming season: Never above 20 °C
- cold
- fresh
- refreshing
- pleasant
- warm
- very warm
The sea temperature in Swansea ranges from 7.6 °C in February to 17.9 °C in August. Even at its warmest the sea stays below 20 °C, so swimming is bracing at best.
The sea warms up slowly: it is warmest in August, while the air already peaks in July. From September to January 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 17.4 and 18.5 °C.
| Month | Average | Cool year | Warm year | Feels |
|---|---|---|---|---|
| JanuaryJan | 8.2° | 7.0° | 9.2° | cold |
| FebruaryFeb | 7.6° | 6.9° | 8.5° | cold |
| MarchMar | 7.9° | 6.7° | 8.8° | cold |
| AprilApr | 9.4° | 8.3° | 10.4° | cold |
| MayMay | 11.7° | 10.9° | 12.9° | cold |
| JuneJun | 14.4° | 13.7° | 15.2° | cold |
| JulyJul | 16.7° | 15.9° | 17.5° | cold |
| AugustAug | 17.9° | 17.4° | 18.5° | fresh |
| SeptemberSep | 17.4° | 16.7° | 18.2° | fresh |
| OctoberOct | 15.2° | 14.7° | 15.8° | cold |
| NovemberNov | 12.5° | 11.7° | 13.2° | cold |
| DecemberDec | 9.8° | 9.0° | 10.3° | cold |
Sunshine hours in Swansea
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 3.6 of 10.8 hours of daylight in Swansea, 33 % 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 Swansea
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 70 min
- Fair skin
- about 90 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 Swansea: 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, Swansea has about 16 rainy days with 131 mm of rain in total.
Wind and clouds in Swansea
How breezy and how cloudy Swansea 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 Swansea typically peaks at 28 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 73 % of the sky over Swansea: mostly cloudy, with about 3.6 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 Swansea
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 10°. A duvet at night and a jumper for the evening.
The coolest nights are in January (4°), the warmest in August (14°). 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 | 7 | 8° | 4° | 8.2° | 2.0 h | 15 | 110 |
| FebruaryFeb | 11 | 8° | 4° | 7.6° | 3.1 h | 13 | 91 |
| MarchMar | 23 | 10° | 5° | 7.9° | 4.2 h | 13 | 79 |
| AprilApr | 44 | 12° | 6° | 9.4° | 6.2 h | 12 | 67 |
| MayMay | 58 | 15° | 9° | 11.7° | 7.1 h | 13 | 77 |
| JuneJun | 72 | 17° | 12° | 14.4° | 7.2 h | 12 | 77 |
| JulyJul | 72 | 19° | 14° | 16.7° | 6.9 h | 14 | 84 |
| AugustAug | 70 | 19° | 14° | 17.9° | 6.4 h | 14 | 91 |
| SeptemberSep | 65 | 17° | 12° | 17.4° | 5.2 h | 12 | 90 |
| OctoberOct | 36 | 14° | 10° | 15.2° | 3.6 h | 16 | 131 |
| NovemberNov | 17 | 11° | 7° | 12.5° | 2.5 h | 16 | 128 |
| DecemberDec | 7 | 9° | 5° | 9.8° | 1.8 h | 16 | 133 |
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
51.62° N, 3.94° W · 18 m · Europe/London
Best time to visit Swansea
The best time to visit Swansea is from June to September. The sea stays too cool for a classic beach holiday: even in August it only reaches 17.9 °C. Rain is most frequent from May to March; the wettest month is December with 133 mm.
Swansea through the seasons
How the weather changes over the seasons, with averages for each.
Swansea in spring
Mar – May
Fair
- 10–15 °C by day
- Sea 10 °C
- 6 h of sun a day
- 38 rainy days in all
Swansea in summer
Jun – Aug
Good
- 17–19 °C by day
- Sea 16 °C
- 7 h of sun a day
- 40 rainy days in all
Swansea in autumn
Sep – Nov
Poor
- 11–17 °C by day
- Sea 15 °C
- 4 h of sun a day
- 45 rainy days in all
Swansea in winter
Dec – Feb
Poor
- 8–9 °C by day
- Sea 9 °C
- 2 h of sun a day
- 44 rainy days in all
Find your perfect month
Tell us what you like and we rate every month in Swansea for you.
Your best months: June – August
Based on the climate averages; tap a month to see its details.
Compare two months in Swansea
Pick two months to see how the weather differs. A tick marks the clearly better value; for temperatures it depends on your plans.
June has the better holiday weather in Swansea: score 72 against 36. In June, days are 3 °C warmer than in October. The sea is 1 °C cooler in June. June has 4 fewer rainy days. The sun shines 4 hours longer a day in June.
| Month | October | June |
|---|---|---|
| Weather score | 36 | 72better |
| Day high | 14° | 17° |
| Night low | 10° | 12° |
| Sea | 15.2° | 14.4° |
| Sunshine | 3.6 h | 7.2 hbetter |
| Rainy days | 16 | 12better |
| Rainfall | 131 mm | 77 mmbetter |
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
No month
15–28 °C and not too much rain
Rainy months
May – Mar
12 or more rainy days
Swansea month by month
The typical weather for every month at a glance.
7January8° · Sea 8° · 2 h
In January, Swansea is cold: daytime highs average 8 °C, and nights cool down to about 4 °C. The sea averages 8.2 °C – swimming is only for the hardy. The sun is scarce, with only about 2 hours a day. It rains often – on about 15 days, adding up to 110 mm. It is often windy, with gusts of around 30 km/h. All in all, January is not an ideal month for a holiday in Swansea.
Swansea in January11February8° · Sea 8° · 3 h
In February, Swansea is cold: daytime highs average 8 °C, and nights cool down to about 4 °C. The sea averages 7.6 °C – swimming is only for the hardy. The sun is scarce, with only about 3 hours a day. Rain is frequent, with about 13 rainy days and 91 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 Swansea.
Swansea in February23March10° · Sea 8° · 4 h
In March, Swansea is cold: daytime highs average 10 °C, and nights cool down to about 5 °C. The sea averages 7.9 °C – swimming is only for the hardy. Expect around 4 hours of sunshine a day. Rain is frequent, with about 13 rainy days and 79 mm in total. All in all, March is not an ideal month for a holiday in Swansea.
Swansea in March44April12° · Sea 9° · 6 h
In April, Swansea is cool: daytime highs average 12 °C, and nights cool down to about 6 °C. The sea averages 9.4 °C – swimming is only for the hardy. Expect around 6 hours of sunshine a day. Rain is frequent, with about 12 rainy days and 67 mm in total. All in all, April is a so-so month for a holiday in Swansea.
Swansea in April58May15° · Sea 12° · 7 h
In May, Swansea is cool: daytime highs average 15 °C, and nights cool down to about 9 °C. The sea averages 11.7 °C – swimming is only for the hardy. The sun shines for around 7 hours a day. Rain is frequent, with about 13 rainy days and 77 mm in total. All in all, May is a so-so month for a holiday in Swansea.
Swansea in May72June17° · Sea 14° · 7 h
In June, Swansea is mild: daytime highs average 17 °C, and nights cool down to about 12 °C. The sea averages 14.4 °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 77 mm in total. All in all, June is a good month for a holiday in Swansea.
Swansea in June72July19° · Sea 17° · 7 h
In July, Swansea is mild: daytime highs average 19 °C, and nights cool down to about 14 °C. The sea averages 16.7 °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 84 mm in total. All in all, July is a good month for a holiday in Swansea.
Swansea in July70August19° · Sea 18° · 6 h
In August, Swansea is mild: daytime highs average 19 °C, and nights cool down to about 14 °C. The sea averages 17.9 °C – bracing, so a wetsuit helps for longer swims. Expect around 6 hours of sunshine a day. It rains often – on about 14 days, adding up to 91 mm. All in all, August is a good month for a holiday in Swansea.
Swansea in August65September17° · Sea 17° · 5 h
In September, Swansea is mild: daytime highs average 17 °C, and nights cool down to about 12 °C. The sea averages 17.4 °C – bracing, so a wetsuit helps for longer swims. Expect around 5 hours of sunshine a day. Rain is frequent, with about 12 rainy days and 90 mm in total. All in all, September is a good month for a holiday in Swansea.
Swansea in September36October14° · Sea 15° · 4 h
In October, Swansea is cool: daytime highs average 14 °C, and nights cool down to about 10 °C. The sea averages 15.2 °C – swimming is only for the hardy. The sun is scarce, with only about 4 hours a day. It rains often – on about 16 days, adding up to 131 mm. All in all, October is not an ideal month for a holiday in Swansea.
Swansea in October17November11° · Sea 13° · 3 h
In November, Swansea is cool: daytime highs average 11 °C, and nights cool down to about 7 °C. The sea averages 12.5 °C – swimming is only for the hardy. The sun is scarce, with only about 3 hours a day. It rains often – on about 16 days, adding up to 128 mm. It is often windy, with gusts of around 29 km/h. All in all, November is not an ideal month for a holiday in Swansea.
Swansea in November7December9° · Sea 10° · 2 h
In December, Swansea is cold: daytime highs average 9 °C, and nights cool down to about 5 °C. The sea averages 9.8 °C – swimming is only for the hardy. The sun is scarce, with only about 2 hours a day. It rains often – on about 16 days, adding up to 133 mm. It is often windy, with gusts of around 30 km/h. All in all, December is not an ideal month for a holiday in Swansea.
Swansea in DecemberSwansea compared
Put Swansea side by side with another destination.
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Swansea vs. Cardiff
In October Cardiff has the better holiday weather (score 41 vs. 36). During the day it is about as warm in Cardiff as in Swansea. The sea is about equally warm.
| in October | Swansea | Cardiff |
|---|---|---|
| Holiday score | 36 | 41 |
| Daytime high | 14° | 14° |
| Sea | 15° | 15° |
| Sunshine | 4 h | 4 h |
| Rainy days | 16 | 14 |
| Best time | Jun – Sep | Jun – Sep |
Through the year
United Kingdom in October: the best places
In October, Swansea ranks 23 among the 31 nearest destinations in this country.
- Winchester15°49
- 2Glastonbury15°48
- 3Reading15°48
- 4Salisbury15°47
- 5Oxford14°47
- 6Stratford-upon-Avon14°46
- 7Southampton15°16°46
- 8Bristol15°45
- 23SwanseaThis page14°15°36
Planning a trip to Swansea
Weather for your travel dates
Pick your arrival and length of stay, and we sum up the weather to expect.
Swansea 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.
Swansea has its best school-holiday weather during the summer holidays (score 71) and its weakest during the Christmas holidays (score 7).
- 38
Easter holidays
Mar – Apr
Poor
- 11 °C by day
- Sea 9 °C
- 5.6 h of sun a day
- 12 rainy days a month
Keep in mind: Frequent rain
- 61
May half-term
May – Jun
Good
- 15 °C by day
- Sea 12 °C
- 7.1 h of sun a day
- 13 rainy days a month
Keep in mind: Frequent rain
- 71
Summer holidays
Jul – Aug
GoodBest holidays
- 19 °C by day
- Sea 17 °C
- 6.6 h of sun a day
- 14 rainy days a month
Keep in mind: Frequent rain
- 36
October half-term
Oct
Poor
- 14 °C by day
- Sea 15 °C
- 3.6 h of sun a day
- 16 rainy days a month
Keep in mind: Frequent rain
- 7
Christmas holidays
Dec – Jan
Poor
- 8 °C by day
- Sea 9 °C
- 1.9 h of sun a day
- 16 rainy days a month
Keep in mind: Frequent rain
Based on the climate averages 1996–2025.
Getting there
Flying from
- Nonstop flight
- Short trip – train or car is often quicker
- Distance
- 240 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 Swansea
When is the best time to visit Swansea?
The best time to visit Swansea 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 Swansea?
The sea temperature in Swansea ranges from 7.6 °C in February to 17.9 °C in August. Even at its warmest the sea stays below 20 °C, so swimming is bracing at best.
Can you swim in Swansea in October?
Only if you don't mind cold water: in October the sea averages just 15.2 °C. Comfortable swimming temperatures are not reached at any time of year.
What is the warmest month in Swansea?
July is the warmest month, with average highs of 19 °C and nights around 14 °C. January is the coolest month at 8 °C.
When does it rain most in Swansea?
Rain is most frequent from May to March; the wettest month is December with 133 mm. The driest month is April with 67 mm.
How many hours of sunshine does Swansea get?
Swansea gets around 1,710 hours of sunshine a year. The sunniest month is June with 7.2 hours a day; in December there are 1.8 hours a day.
What time zone is Swansea in?
Swansea uses the time zone Europe/London: UTC+0 in January and UTC+1 in July.
Which school holidays are best for Swansea?
Swansea has its best school-holiday weather during the summer holidays (score 71) and its weakest during the Christmas holidays (score 7). Holiday ratings (0–100): Easter holidays 38, May half-term 61, Summer holidays 71, October half-term 36, Christmas holidays 7.
Near Swansea
Other destinations close by.
Places with a climate like Swansea
Destinations whose weather through the year is closest to Swansea's – good alternatives.