Dollymount Strand — Sea temperature now
Dublin family beach.
Cool water with a light chop and a light breeze — fresh conditions — a wetsuit is recommended.
Location
Dollymount Strand 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 Dollymount Strand
The sea in Dollymount Strand peaks in August, when the water averages around 16°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 9°C, when cold-water swimmers dominate the coast.
Dollymount Strand sea temperature history
Long-term climatology for Dollymount Strand shows an annual mean sea temperature of 12°C, ranging from 9°C in winter to 16°C at the summer peak.
The seasonal swing is roughly 7°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 Dollymount Strand, 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.
Dollymount Strand sea temperature: frequently asked questions
What is the warmest month to swim in Dollymount Strand?
August is the warmest month in Dollymount Strand, when the sea averages about 16°C. Late-season warmth often persists a few weeks after peak.
When is the sea coldest in Dollymount Strand?
The coldest month in Dollymount Strand is typically February, when the water averages around 9°C. Cold-water swimmers and surfers dominate this period.
When can you swim in Dollymount Strand without a wetsuit?
The sea in Dollymount Strand 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 Dollymount Strand?
Outside peak summer the water in Dollymount Strand 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 Dollymount Strand?
The long-term annual mean sea temperature in Dollymount Strand is about 12°C, based on multi-decadal climatology of the surrounding waters.
How do I check the current sea temperature in Dollymount Strand?
The live reading at the top of this page shows the current sea temperature in Dollymount Strand, 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 | 10°C | Cold |
| Feb | 9°C | Cold |
| Mar | 9°C | Cold |
| Apr | 10°C | Cold |
| May | 11°C | Cold |
| Jun | 13°C | Cold |
| Jul | 15°C | Bracing |
| Aug ⭐ | 16°C | Bracing |
| Sep | 15°C | Bracing |
| Oct | 14°C | Bracing |
| Nov | 12°C | Cold |
| Dec | 11°C | Cold |