Port Eynon Bay — Sea temperature now
Gower family beach.
Fresh water with a light chop and a light breeze — fresh conditions — a wetsuit is recommended.
Location
Port Eynon Bay on the map, with nearby beaches and live sea temperatures.
7-day forecast
Water, air, waves, wind and UV outlook for the week ahead.
Monthly sea temperature averages
Typical year-round water temperature, based on regional climatology.
Best time to swim in Port Eynon Bay
The sea in Port Eynon Bay peaks in August, when the water averages around 17°C.
On average, 0 months a year sit above 20°C — the threshold most swimmers describe as pleasant without a wetsuit.
Outside peak season the water drops toward 9°C, so a 3/2mm shorty or full wetsuit makes long swims much more comfortable.
The coldest month is typically February at around 8°C, when cold-water swimmers dominate the coast.
Port Eynon Bay sea temperature history
Long-term climatology for Port Eynon Bay shows an annual mean sea temperature of 12°C, ranging from 8°C in winter to 17°C at the summer peak.
The seasonal swing is roughly 9°C between the coldest and warmest month — a useful yardstick when comparing years or checking whether the current sea is running above or below average.
Recent decades have trended slightly warmer at Port Eynon Bay, in line with regional sea-surface temperature records for the wider basin.
Monthly averages below are drawn from multi-decadal climatology and are updated as new observations arrive.
Port Eynon Bay sea temperature: frequently asked questions
What is the warmest month to swim in Port Eynon Bay?
August is the warmest month in Port Eynon Bay, when the sea averages about 17°C. Late-season warmth often persists a few weeks after peak.
When is the sea coldest in Port Eynon Bay?
The coldest month in Port Eynon Bay is typically February, when the water averages around 8°C. Cold-water swimmers and surfers dominate this period.
When can you swim in Port Eynon Bay without a wetsuit?
The sea in Port Eynon Bay rarely climbs above 20°C, so a wetsuit is recommended year-round for anything longer than a quick dip.
Do I need a wetsuit in Port Eynon Bay?
Outside peak summer the water in Port Eynon Bay drops toward 9°C, so a 3/2mm shorty or full wetsuit makes long swims much more comfortable. In peak months most swimmers go without.
What is the average sea temperature in Port Eynon Bay?
The long-term annual mean sea temperature in Port Eynon Bay is about 12°C, based on multi-decadal climatology of the surrounding waters.
How do I check the current sea temperature in Port Eynon Bay?
The live reading at the top of this page shows the current sea temperature in Port Eynon Bay, updated hourly from marine buoy and satellite data. The 7-day forecast covers water, air, waves, wind and UV for the week ahead.
Year-round sea temperature
| Month | Sea | Comfort |
|---|---|---|
| Jan | 9°C | Cold |
| Feb | 8°C | Cold |
| Mar | 8°C | Cold |
| Apr | 9°C | Cold |
| May | 11°C | Cold |
| Jun | 14°C | Bracing |
| Jul | 16°C | Bracing |
| Aug ⭐ | 17°C | Bracing |
| Sep | 16°C | Bracing |
| Oct | 14°C | Bracing |
| Nov | 12°C | Cold |
| Dec | 10°C | Cold |