# Catalina Island water temperature

Sea temperature at Catalina Island is 22.7 °C (72.9 °F).

- Location: Catalina Island, USA
- Timezone: America/New_York
- Source: Open-Meteo marine forecast (snapshot)
- Generated at: 2026-09-24T09:55:37.060307-04:00
- Forecast page: https://snorkelforecast.com/usa/catalina-island/
- HTML sea temperature: https://snorkelforecast.com/usa/catalina-island/sea-temperature/
- Temperature is not a safety rating or snorkel score.
- Guidance: Mild water
- What to wear: A rash guard is useful; cold-sensitive snorkelers may prefer a shorty wetsuit.

## Monthly baseline

- January: 15.1 °C (59.2 °F)
- February: 14.6 °C (58.3 °F)
- March: 14.4 °C (57.9 °F)
- April: 15.1 °C (59.2 °F)
- May: 16.8 °C (62.2 °F)
- June: 18.8 °C (65.8 °F)
- July: 20.3 °C (68.5 °F)
- August: 21.2 °C (70.2 °F)
- September: 21.0 °C (69.8 °F)
- October: 19.7 °C (67.5 °F)
- November: 17.5 °C (63.5 °F)
- December: 16.4 °C (61.5 °F)