Island Overview
Clear skies cover Crete from end to end on Sunday 23 August. Every recording station reports zero precipitation and sunshine throughout the day. Highs range from 29.7°C in Sitia to 34.2°C in Elounda, placing this firmly in the hot late-summer bracket. The island is dry, sunny, and warm at every elevation below the high mountain peaks.
North vs South
The north coast carries more wind today. Heraklion records the strongest gusts at 21.9 km/h, while Hersonissos and Malia both sit at 16.8 km/h. These are typical late-Meltemi conditions that keep the central north coast slightly more bearable in direct afternoon sun. Chania is the exception, with the lightest winds on the north coast at 11.3 km/h and a high of 32.1°C. Overnight minimums there stayed at 26°C, the warmest night island-wide. On the south coast, Ierapetra and Makrigialos sit at 32 to 32.8°C with gentle winds and nighttime lows above 25°C, meaning the south offers little cooling after sunset for those based there.
Mountains
The White Mountains above Chania and Mount Ida inland from Rethymno remain the only zones where temperatures drop noticeably. Any hiking above 1,000 metres will feel fresher, but the valleys below hold the heat well into the evening. If you plan a mountain walk, start before 07:00 and be off exposed ridges before noon.
Sea State, Wind and UV
Sea surface temperatures range from 26.2°C to 27.1°C, among the warmest readings of the year. Wave heights are minimal across the island: the highest swell is 0.84 m off Chania, and most bays sit under 0.6 m. The UV index peaks at 8.0 in Rethymno and 7.9 in Chania, placing all locations firmly in the high band. Meaningful UV levels begin before 10:00 and do not ease until after 17:00.
Swim Verdict
Excellent. Flat to very light swell, water temperatures between 26 and 27°C, and clear visibility make today one of the better swimming days of August at every beach on the island. The east coast bays around Elounda and Ag. Nikolaos combine the warmest air with calm water for those looking for the best overall conditions.
Practical Tip for the Day
UV at this latitude in late August burns unprotected skin in under 20 minutes at midday. Apply SPF 50 before leaving your accommodation, reapply after every swim, and keep a hat on between 11:00 and 16:00. The high reading in Rethymno today (UV 8.0) is a reminder that this is not a factor to manage only at the beach.
