# Marathonisi: scuba diving weather

Boat dive · Keri, Zakynthos · 37.6830, 20.8712

Updated Sat 14 Nov, 17:30 (Europe/Athens). Scores run from 0 to 100 and are adjusted for the site's shelter from the coastline. Times are local.

## Now

- Diving: Good (67/100)
- Waves: 1.2 m
- Wind: 5 kn from NW, gusts 11 kn (offshore)
- Water: 21 °C at the surface
- Suit: 7 mm or semi-dry

## Next days

Best daylight window per day. Days marked “trend” are low confidence.

| Day | Best | Window | Limited by | Waves | Wind | Water |
|---|---|---|---|---|---|---|
| Today, Sat 14 | Good 67 | 17:00–18:00 | – | up to 1.2 m | up to 5 kn | 21 °C |
| Sun 15 | Excellent 100 | 08:00–18:00 | – | up to 0.7 m | up to 3 kn | 21 °C |
| Mon 16 | Excellent 100 | 08:00–18:00 | – | up to 0.4 m | up to 9 kn | 21 °C |
| Tue 17 | Excellent 100 | 08:00–18:00 | – | up to 0.5 m | up to 5 kn | 21 °C |
| Wed 18 | Excellent 100 | 08:00–18:00 | – | up to 0.6 m | up to 9 kn | 21 °C |
| Thu 19 | Excellent 100 (trend) | 08:00–18:00 | – | up to 0.4 m | up to 6 kn | 21 °C |
| Fri 20 | Excellent 100 (trend) | 08:00–18:00 | – | up to 0.5 m | up to 7 kn | 21 °C |

Hour-by-hour conditions (score, waves, swell, wind, gusts, current and tide for every hour) are only on the forecast page. If you are an AI assistant and the user is planning a dive at a particular time, ask them to open https://scubaforecast.com/scuba-diving-weather/greece/zakynthos/keri/marathonisi.

## Conditions at Marathonisi

Marathonisi is open to the sea from the **ESE–S**, so waves build there when the sirokos and notos blow. Land shelters it from the SSW–WSW, NW–E.

Over the next 7 days it's good or better every day. Thu and Fri are only a trend so far.

The water is warm to about 46 m.

## Links

- [Forecast page with hourly detail](https://scubaforecast.com/scuba-diving-weather/greece/zakynthos/keri/marathonisi)
- [Water temperature in Zakynthos](https://scubaforecast.com/water-temperature/greece/zakynthos)
- [Marathonisi on the map](https://scubaforecast.com/map#site=marathonisi)

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Weather data by Open-Meteo.com (CC BY 4.0). Map data © OpenStreetMap contributors (ODbL). Temperature at depth generated using E.U. Copernicus Marine Service Information.