Island Overview
A persistent layer of cloud covers Crete from west to east on 4 June 2026. Every reporting station reports overcast or foggy skies, yet no rain is expected anywhere on the island. Temperatures climb into the high twenties across most of the northern coast, and the cloud cover does nothing to reduce UV levels, which are classed as very high at 8.2 to 8.5 across all locations. Apply sunscreen regardless of what the sky looks like.
North vs. South
The temperature contrast between the two coasts is marked today. The northern strip from Chania (30.0°C) through Heraklion (29.8°C) and east to Ag. Nikolaos and Elounda (29.2°C each) stays warm. Rethymno reaches 28.4°C, and Hersonissos and Malia land near 28 to 29°C. The far east, including Sitia at 29.1°C, broadly mirrors the rest of the north.
The south coast is a different picture. Ierapetra tops out at just 23.9°C under morning fog, and Makrigialos reaches 25.5°C, also fog-affected. Visitors heading south should expect a cooler, hazier start to the day. The fog is likely to thin by midday but may not fully clear.
Mountain Conditions
The White Mountains above Chania and the Psiloritis massif above Rethymno will be cloud-capped through much of the day. Hikers planning the Samaria Gorge or any high-altitude route should carry a windproof layer. Temperatures drop sharply above 1,000 metres even in early June, and visibility on the upper sections may be limited in morning cloud.
Sea, Wind and UV
Sea conditions are calm across the island. Wave heights are minimal, peaking at 0.84 metres off Chania and barely 0.22 metres near Ag. Nikolaos. Sea surface temperatures range from 21.7°C at Makrigialos to 22.9°C at Heraklion. Wind is light to moderate at 11 to 18 km/h, with the briskest readings on the north-east coast around Ag. Nikolaos and Elounda. No warnings apply for beachgoers or day trips by boat.
Swim Verdict
Good swimming conditions island-wide. Water temperatures are consistently above 21°C, seas are calm, and there is no rain to disrupt a beach afternoon. The flat light under overcast skies does not affect water quality or safety in any way.
Practical Tip for the Day
Do not skip sunscreen because the sky is grey. UV indices above 8 are classed as very high, and cloud blocks very little UV radiation. Use SPF 30 or above before going out and reapply after swimming. Skipping sun protection on overcast days is the most common beach mistake in the Mediterranean in June.
