Cyprus sea temperature by month, and when it is actually warm

Cyprus sea temperatures average 28°C in August and 17°C in February, and every month from June to November sits at 22°C or above. The figure worth knowing is October’s: at 25°C the sea is warmer in October than it is in June, and warmer in November than it is in May. The island’s water runs roughly two months behind its air temperature, which is why a late-autumn holiday swims better than a spring one that looks identical in the brochure.

That lag is the whole story, and almost nothing on the first page of Google for this search mentions it. What you get instead is a wall of live-reading widgets telling you what the sea is doing today, which is useful if you are already on the beach and useless if you are choosing between May and October from a laptop in March.

So here are the monthly figures, what each one actually feels like, and the handful of things that will change your swim more than the calendar does.

Cyprus sea temperature by month

These are the official averages published by the Cyprus Deputy Ministry of Tourism, compiled from 22 meteorological stations across the decade 2011 to 2020. I have cross-checked every month against NOAA satellite sea-surface readings for Larnaca, Limassol, Protaras and the Paphos coast, and the two sources agree to within about half a degree throughout the year.

Month	Average sea temp	What that feels like
January	18°C	Cold. A short swim for people who enjoy that sort of thing
February	17°C	The coldest water of the year, along with March
March	17°C	Still cold, though the air has already turned
April	18°C	Bracing. Fine for a dip, not for an afternoon
May	21°C	Swimmable, and noticeably colder than the air suggests
June	24°C	Comfortable for most people without thinking about it
July	27°C	Warm. Refreshing only in the first minute
August	28°C	The warmest of the year, and arguably too warm to cool you down
September	27°C	Peak swimming conditions, with the August heat gone from the air
October	25°C	Warmer than June. The best-value swimming month of the year
November	22°C	Still a proper swim, if a shorter one
December	19°C	Cooling fast. A dip rather than a session

Why October swims better than May

Water holds heat far longer than air does. Cyprus spends its summer pouring energy into a shallow coastal shelf, and the sea keeps giving that heat back through the autumn long after the air has started to drop. Come spring the process runs in reverse: the air warms quickly while the sea is still working its way out of winter.

Lined up side by side, the effect is obvious:

Pair of months	Air feels	Sea is
May vs November	May is warmer on land, 27°C against 22°C	November is warmer in the water, 22°C against 21°C
June vs October	June is warmer on land, 30°C against 27°C	October is warmer in the water, 25°C against 24°C
April vs December	April is much warmer on land, 22°C against 17°C	December is warmer in the water, 19°C against 18°C

If swimming is a significant part of why you are going, this should push you towards the back half of the year. A late-October week gives you warmer water than mid-June, quieter beaches and lower prices, and our October in Cyprus month guide covers what else changes at that point in the season. The trade is daylight and the odd wet day, which the Cyprus in November guide sets out honestly.

The same logic works against a May or early-June trip sold on swimming. The land will be beautiful and the sea will be colder than you are expecting.

Does your resort change the answer?

Not really. This is the question the resort-level searches are all circling, and the honest answer is that the island is too small for it to matter.

Coast	Resorts	August average	October average
East	Protaras, Ayia Napa, Paralimni, Larnaca	28.1°C	25.3°C
South and west	Limassol, Pissouri, Paphos, Coral Bay	27.8°C	24.8°C

Those gaps are a few tenths of a degree, which is well inside the range of a windy afternoon. Nobody has ever stepped out of the sea at Coral Bay and noticed that Protaras was half a degree warmer.

What does vary between resorts is shelter. A bay that faces away from the prevailing westerly stays flatter and feels warmer because you are not fighting chop, which is why sheltered spots like Konnos Bay and Fig Tree Bay swim so well on days when an exposed west-coast beach is uncomfortable. Pick your base from the best beaches in Cyprus guide and the Paphos beaches or Protaras beaches round-ups, then stop worrying about the thermometer.

Winter, and who swims in it

January averages 18°C, February and March both 17°C. That is genuinely cold water, and it is the one part of the year where the monthly figure tells you almost everything you need.

Cypriots do swim through it, and so do a number of resident British and Russian retirees, usually in short morning sessions with a coffee afterwards. For a visitor it is a personal cold-water decision rather than a reason to book. The Cyprus in winter guide goes through what the season is actually good for, which is walking, food, empty archaeology and the Troodos, and it makes the point worth repeating here: never assume a hotel pool is heated in winter. Ask the property directly, in writing, before it becomes the reason you chose it.

Four things that matter more than the monthly average

Wind and swell. A 25°C sea in a stiff westerly is a worse swim than a 22°C sea in a flat bay. Check the forecast for wind rather than air temperature, and be prepared to drive round to the other side of a headland.

Time of day. The shallow sand shelves at places like Nissi and Fig Tree Bay warm several degrees through the afternoon and give it back overnight. An 8am swim in October is a different experience from a 4pm one on the same beach.

Lifeguard cover. Cyprus has 113 lifeguard towers, and the Cyprus Mail reported in August 2026 that 33 of them were unstaffed, with cover on most beaches running from around 9.30am or 10am to 5pm. Cover thins out at the edges of the season, exactly when the water is still warm and the beaches are quiet. Swim within your depth and read the flags, and our is Cyprus safe guide covers the rest.

Water quality. Cyprus was awarded 56 Blue Flags for 2026, along with two marinas, down from 64 the previous year after Limassol and Amathus did not submit applications following pollution reports in 2025. The Protaras area alone holds 18 of them. A Blue Flag is not a temperature guarantee, but it is a reasonable proxy for water quality, lifeguard provision and facilities at the beach you are walking to.

The short version

Book September or October if the sea is the point: 27°C and 25°C respectively, with the air more comfortable than August and the water warmer than June. November still gives you a real swim at 22°C. May and early June look better on paper than they feel in the water, so treat a spring trip as a walking and wildflower holiday with some swimming attached rather than the other way round. And from December to April, plan around the land.

If you want more than a swim, the sea is at its clearest in the autumn too, which is why the scuba diving guide and the boat trips out to the Blue Lagoon are worth more in October than in high summer.

Sources: monthly averages from the Cyprus Deputy Ministry of Tourism’s climate table, “Weather conditions in Cyprus (statistics from 22 meteorological stations), decade 2011-2020”, published in A Guide to Cyprus; resort-level climatologies from Sea Temperature, derived from NOAA daily satellite sea-surface readings and retrieved 19 September 2026; lifeguard figures from the Cyprus Mail, 24 August 2026; Blue Flag counts from Cyprus Mail, 11 June 2026. Monthly averages are long-run figures and not a forecast, so check conditions for your own dates before you plan a day around them.

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Hero photograph via Unsplash, used illustratively.