Mamaia (Constanța) weather by month
The best time to visit Mamaia (Constanța) is July to September — 95/100 in August, 29°C and 2 rainy days. The best season is summer, June to August (91/100 on average).
The worst month is January at 42/100 — cold, a little rain, clean air. See January →
Updated September 2026 · climate normals from ERA5 reanalysis
Planning the wider trip? Best time to visit Romania →
Best season: June to August (91/100 on average) · worst January (42/100)
- Days
- 29°C
- Nights
- 21°C
- Wet days
- 2
- Sun
- 12.4 h
- Humidity
- 64%
- Daylight
- 14 h

Mamaia, month by month
Comfort score out of 100 for the kind of trip Mamaia is best for, the average high, rainy days and hours of sun a day from the climate normals, and how busy it tends to be.
What's on in Mamaia through the year
Festivals, natural spectacles, holidays and the seasons to watch out for — curated and sourced. The month pages carry the detail.
- April
- May Day on the coast29 Apr – 3 May (usually)Holiday
- May
- Beach season opens25 May – 15 Sep (usually)Season
- June
- Sea warm enough to swim15 Jun – 15 Sep (usually)Season
- July
- Neversea1–15 Jul (usually)Festival
- Romanian summer holidays15 Jul – 25 Aug (usually)Holiday
- September
- Resort shutdown20 Sep – 20 May (usually)Season
Crowds in Mamaia in August
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
Peak crowdsBeach season opens, Romanian summer holidays, school holidays in 7 of the markets that fill it(estimated)
Peak crowdsBusyShoulder seasonQuiet
Traveller notes on Mamaia
What people who have been say about the place — the year-round notes first, then month by month.
Romania's forum describes February as genuinely cold nationwide, typically 0-5C by day with a real chance of snow, and one Bucharest visitor reported nights as low as -14C during a cold snap. Mamaia's coastal position moderates things somewhat compared to inland cities, but posters were clear the Black Sea coast is fundamentally a summer destination - most of what makes Mamaia appealing (the beach, the resort strip) is dormant this time of year, so it's really a stopover rather than a winter destination in its own right.
Forum posters name the July 15 to August 25 window as the best time to visit Mamaia, when the Black Sea stays warm and comparatively shallow near shore. Posters describe typical conditions as very warm, above 30C in Romania's lower-elevation coastal areas, with one visitor even in late September reporting a fabulous 32C with clear skies and a gentle breeze - suggesting August itself should run at least as warm. Posters consistently flag real crowding as the trade-off for that peak-season heat and sunshine, describing Mamaia as one of Romania's more traditional resorts and especially packed during July and August. Posters generally rate August as ideal for a beach vacation here, crowds notwithstanding.
Add your own note from Mamaia's card on the map.