Tenby’s south-facing beaches are sheltered and enjoy one of the sunniest climates in Wales. Many attractions and Caldey boats run only from spring to autumn.
Season by season
Spring (March–May)
Fresh, quiet and increasingly sunny. Caldey boats usually start around Easter.
Summer (June–August)
Peak season: lifeguards, packed beaches and busy streets. Book everything ahead.
Autumn (September–November)
Warm seas in September and a lively events calendar, then a quiet November.
Winter (December–February)
Calm and inexpensive. The Boxing Day charity swim draws big crowds.
Month by month
| Month | Avg high / low | Wet days | Daylight | Our verdict |
|---|---|---|---|---|
| January | 9° / 4°C | ≈17 | ≈8.5 h | Quiet & cheap |
| February | 9° / 4°C | ≈13 | ≈10 h | Quiet & cheap |
| March | 10° / 5°C | ≈14 | ≈11.8 h | Good |
| April | 12° / 6°C | ≈11 | ≈13.7 h | Good |
| May | 15° / 9°C | ≈11 | ≈15.3 h | Best |
| June | 17° / 11°C | ≈10 | ≈16.2 h | Best |
| July | 19° / 13°C | ≈11 | ≈15.7 h | Peak season |
| August | 19° / 13°C | ≈12 | ≈14.3 h | Peak season |
| September | 17° / 12°C | ≈12 | ≈12.5 h | Best |
| October | 15° / 10°C | ≈15 | ≈10.7 h | Good |
| November | 12° / 7°C | ≈16 | ≈9 h | Quiet & cheap |
| December | 10° / 5°C | ≈16 | ≈8.1 h | Quiet & cheap |
Approximate long-term averages, rounded; daylight is the approximate time between sunrise and sunset mid-month. Wales is mild but wet, and the mountains are colder, windier and wetter than the coast: pack layers in every season.
Festivals & events
- September Ironman Wales, with the swim leg starting from North Beach.
- Autumn Tenby Arts Festival.
- 26 December The Boxing Day fancy-dress swim on North Beach.
Crowds & booking ahead
Tenby gets very busy in August and on sunny bank-holiday weekends. Visit in June or September for the best balance of weather and space.
