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Greece weather in April: temperatures, sea and rain
In April Athens averages 12–20°C, with about 6 rain days. The sea around Athens and the islands is around 16–18°C. Warmest place in the table: Athens (up to 20°C). Thessaloniki: 8–19°C.
Temperatures, sea and rain in April
| Place | Temp (min–max) | Sea | Rain days | Rain (mm) |
|---|---|---|---|---|
| Athens | 12–20° | 16° | 6 | 25 |
| Thessaloniki | 8–19° | — | 6 | 40 |
| Crete (Heraklion) | 12–20° | 17° | 3 | 25 |
| Rhodes | 14–20° | 18° | 5 | 40 |
| Mykonos (Cyclades) | 13–18° | 16° | 5 | 25 |
| Santorini (Cyclades) | 13–19° | 16° | 3 | 30 |
Long-term averages in Celsius, from Climates to Travel (Athens, Thessaloniki and Heraklion: 1991–2020). “Rain days”: days in the month with precipitation. The source gives no sea temperature for Thessaloniki. These are averages, not a forecast: any year can bring heatwaves, cold spells or storms.
The sea in April: can you swim?
Too cold for most people: the sea averages 16–18°C. April is not beach season in Greece.
What's open and on in April
- The islands wake up: in Mykonos about 75% of tourist businesses are open by late April, and direct Mykonos–Santorini ferries usually start in early April. (SantoriniDave)
Holidays and events
- 30 April 2027 · Good Friday (Orthodox) Shops usually open only from midday. Public services closed.
- 21 April 2027 – 28 April 2027 · ✡️ Passover (starts the evening of 21 April)
Greek holidays: full calendar · Jewish holidays: Hebcal – Jewish holidays 5787
What to pack in April
- Layers: short and long sleeves, a sweater and a light jacket.
- A light rain jacket or a folding umbrella.
Plan your trip
Common questions
What is the weather like in Greece in April?
In April Athens averages 12–20°C, with about 6 rain days. The sea around Athens and the islands is around 16–18°C. Warmest place in the table: Athens (up to 20°C). Thessaloniki: 8–19°C.
Can you swim in the sea in Greece in April?
Too cold for most people: the sea averages 16–18°C. April is not beach season in Greece.
How many rain days are there in Greece in April?
Athens has about 6 rain days on average in April. Most rain days in the table: Athens (6).
Where is warmest in Greece in April?
By the averages in the table, Athens: up to 20°C by day. Coldest is Thessaloniki and the north: 8–19°C.
What should I pack for Greece in April?
Layers: short and long sleeves, a sweater and a light jacket. A light rain jacket or a folding umbrella.
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Sources
Information checked on 4 October 2026. Dates and opening hours change, so check before you travel.
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