Swansea
May
Weather in Swansea for May 2025
Your guide to Swansea weather in May - trends and predictions
In general, the average temperature in Swansea at the beginning of May is 13.1 °C. As the month progressed, temperatures tended to noticeably warm up, reaching an average of 16 °C by the end of May.
Swansea sees moderate rainfall in May, averaging 6 rainy days.
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25
Dry days
6
Rainy days
0
Snow days
16°/9°
Temperatures
20 km/h
Avg max wind
82 %
Avg humidity
Swansea in May average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  14° | 2 12° | 3  12° | 4  13° | |||
| 5 13° | 6 14° | 7  14° | 8 13° | 9 14° | 10 14° | 11 15° |
| 12 16° | 13 15° | 14 14° | 15 14° | 16  15° | 17 15° | 18 15° |
| 19 16° | 20 16° | 21 16° | 22 16° | 23 14° | 24  16° | 25 16° |
| 26 16° | 27 15° | 28 16° | 29 16° | 30 17° | 31 16° |
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Temperatures trend during May in Swansea
See the weather trend as well as the moving average line
May weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 May | Patchy rain possible | 14° /8° | 5.5 mm | 4 | |
| 2 May | Patchy rain possible | 12° /8° | 20.9 mm | 3 | |
| 3 May | Partly cloudy | 12° /8° | 0.6 mm | 4 | |
| 4 May | Moderate or heavy rain shower | 13° /8° | 10.5 mm | 3 | |
| 5 May | Patchy rain possible | 13° /9° | 3.4 mm | 3 | |
| 6 May | Moderate or heavy rain shower | 14° /9° | 5.2 mm | 3 | |
| 7 May | Cloudy | 14° /10° | 0.2 mm | 3 | |
| 8 May | Moderate or heavy rain shower | 13° /10° | 9.6 mm | 3 | |
| 9 May | Patchy rain possible | 14° /10° | 0.8 mm | 4 | |
| 10 May | Moderate rain at times | 14° /10° | 1.3 mm | 4 | |
| 11 May | Moderate or heavy rain shower | 15° /9° | 3.1 mm | 4 | |
| 12 May | Patchy rain possible | 16° /9° | 2.2 mm | 4 | |
| 13 May | Patchy rain possible | 15° /9° | 5.7 mm | 4 | |
| 14 May | Patchy rain possible | 14° /10° | 1.1 mm | 4 | |
| 15 May | Partly cloudy | 14° /9° | 0.3 mm | 4 | |
| 16 May | Overcast | 15° /8° | 3 mm | 4 | |
| 17 May | Overcast | 15° /9° | 0.4 mm | 4 | |
| 18 May | Overcast | 15° /10° | 1.2 mm | 4 | |
| 19 May | Patchy rain possible | 16° /9° | 0.2 mm | 4 | |
| 20 May | Cloudy | 16° /9° | 0 mm | 5 | |
| 21 May | Partly cloudy | 16° /10° | 1.7 mm | 4 | |
| 22 May | Overcast | 16° /9° | 0.9 mm | 4 | |
| 23 May | Overcast | 14° /8° | 0.2 mm | 4 | |
| 24 May | Sunny | 16° /9° | 0 mm | 5 | |
| 25 May | Cloudy | 16° /9° | 4.6 mm | 4 | |
| 26 May | Overcast | 16° /10° | 2.2 mm | 4 | |
| 27 May | Cloudy | 15° /9° | 1.1 mm | 4 | |
| 28 May | Overcast | 16° /11° | 6 mm | 4 | |
| 29 May | Partly cloudy | 16° /9° | 0.3 mm | 4 | |
| 30 May | Sunny | 17° /9° | 0.2 mm | 5 | |
| 31 May | Overcast | 16° /10° | 0.2 mm | 4 | |
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Important Notice
Our weather forecast for Swansea in May is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Swansea forecast closer to your planned date for the most up-to-date weather information.
Swansea in May - FAQ
What are the expected maximum and minimum temperatures in Swansea during May?
Enjoy moderate daytime temperatures of up to 16° and cooler nights around 9°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Swansea during May?
Significant rainfall exceeding 156.2 mm is expected in Swansea during May, occurring over more than 6 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Swansea during May?
The average wind speed in Swansea during May is 20 km/h, suggesting breezy to windy conditions, depending on your activities.
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