Neptun Beach — Sea temperature now
Romanian Black Sea beach near Neptun.
Warm water with a light chop and a light breeze — great swimming conditions.
Location
Neptun Beach 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 Neptun Beach
The sea in Neptun Beach peaks in August, when the water averages around 25°C.
The main swimming season runs from June – September, when surface temperatures stay comfortable for extended sessions.
On average, 4 months a year sit above 20°C — the threshold most swimmers describe as pleasant without a wetsuit.
Shoulder months like May and October are noticeably cooler but often quieter, with fewer crowds and steadier weather.
Outside peak season the water drops toward 10°C, so a 3/2mm shorty or full wetsuit makes long swims much more comfortable.
The coldest month is typically February at around 3°C, when cold-water swimmers dominate the coast.
Neptun Beach sea temperature history
Long-term climatology for Neptun Beach shows an annual mean sea temperature of 14°C, ranging from 3°C in winter to 25°C at the summer peak.
The seasonal swing is roughly 22°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 Neptun Beach, 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.
Neptun Beach sea temperature: frequently asked questions
What is the warmest month to swim in Neptun Beach?
August is the warmest month in Neptun Beach, when the sea averages about 25°C. Late-season warmth often persists a few weeks after peak.
When is the sea coldest in Neptun Beach?
The coldest month in Neptun Beach is typically February, when the water averages around 3°C. Cold-water swimmers and surfers dominate this period.
When can you swim in Neptun Beach without a wetsuit?
The main swimming season in Neptun Beach runs from June – September — about 4 months a year when the sea sits above 20°C, the level most swimmers describe as pleasant without a wetsuit.
Do I need a wetsuit in Neptun Beach?
Outside peak summer the water in Neptun Beach drops toward 10°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 Neptun Beach?
The long-term annual mean sea temperature in Neptun Beach is about 14°C, based on multi-decadal climatology of the surrounding waters.
How do I check the current sea temperature in Neptun Beach?
The live reading at the top of this page shows the current sea temperature in Neptun Beach, 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
Best swim months: Jun – Jul – Aug – Sep
| Month | Sea | Comfort |
|---|---|---|
| Jan | 4°C | Cold |
| Feb | 3°C | Cold |
| Mar | 5°C | Cold |
| Apr | 9°C | Cold |
| May | 15°C | Bracing |
| Jun | 21°C | Pleasant |
| Jul | 24°C | Warm |
| Aug ⭐ | 25°C | Warm |
| Sep | 22°C | Warm |
| Oct | 17°C | Bracing |
| Nov | 12°C | Cold |
| Dec | 7°C | Cold |