Surf Forecasts:
How big are the waves at Castlerock today (20 Jun):
- Morning surf: Morning surf (20 Jun, local time) - 1.5ft (0.4m), 7s period with NW swell.
- Afternoon surf: Afternoon surf (20 Jun, local time) - 1.5ft (0.4m), 6s period with WNW swell.
- Evening surf: Evening surf (20 Jun, local time) - 1.5ft (0.4m), 6s period with NW swell.
The current surf forecast for Castlerock at 3AM is: 0.4m 7s primary swell from a Northwest direction (forecast issued at 12:00am June 20). The wind direction is predicted to be cross-offshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (20 Jun) | 1.5ft (0.4m) | 7s |
| Afternoon (20 Jun) | 1.5ft (0.4m) | 6s |
| Evening (20 Jun) | 1.5ft (0.4m) | 6s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Updates in hr min s Forecast update imminent
Short Range ForecastMostly dry. Very mild (max 19°C on Mon afternoon, min 11°C on Fri night). Wind will be generally light. | ||||||||||||||||||||||||
Saturday 20 | Sunday 21 | Monday 22 | ||||||||||||||||||||||
1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | 1 AM | 4 AM | 7 AM | 10 AM | 1 PM | 4 PM | 7 PM | 10 PM | |
Swell Height Map |  |  |  |  |  |  |  |  |  | |||||||||||||||
Wave Height (m) Direction Period (s) | NW 8 | NW 7 | NW 7 | NW 7 | NW 7 | WNW 6 | NW 6 | NW 6 | NW 6 | NW 7 | NW 7 | NW 7 | NW 7 | NW 7 | NW 7 | NW 8 | NW 8 | NW 8 | NW 7 | NW 7 | NW 7 | NW 7 | NW 7 | NW 7 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 14 | 14 | 12 | 12 | 11 | 16 | 20 | 14 | 11 | 15 | 16 | 30 | 30 | 31 | 32 | 35 | 36 | 35 | 34 | 27 | 26 | 18 | 18 | 18 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | cross-on | cross-on | on | on | glassy | glassy | glassy | cross-on | cross-on | cross-on | cross-on | cross-on | glassy | cross-off | off | glassy | cross-off | cross-on | cross-on | glassy |
High Tide | 10:29PM1.81m | 10:39AM1.27m | 11:26PM1.70m | 11:36AM1.18m | 00:28AM1.57m | 12:47PM1.13m | ||||||||||||||||||
Low Tide | 5:20AM0.38m | 4:55PM0.27m | 6:17AM0.47m | 5:50PM0.37m | 7:15AM0.53m | 6:52PM0.47m | ||||||||||||||||||
 | |  | |  | | | | | | | | | | | |  | |  | | | | | | |
 | — | 4:46 | — | — | — | — | — | — | — | 4:46 | — | — | — | — | — | — | — | 4:46 | — | — | — | — | — | — |
 | — | — | — | — | — | — | — | 10:09 | — | — | — | — | — | — | — | 10:10 | — | — | — | — | — | — | — | 10:10 |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 12 | 11 | 11 | 13 | 15 | 16 | 14 | 13 | 12 | 11 | 11 | 13 | 15 | 16 | 17 | 17 | 16 | 15 | 16 | 16 | 17 | 18 | 19 | 19 |
Feels °C | 10 | 8 | 9 | 10 | 12 | 13 | 12 | 12 | 12 | 10 | 10 | 12 | 13 | 13 | 15 | 16 | 15 | 13 | 14 | 14 | 16 | 17 | 19 | 20 |
Swell 1 Height (m) Direction Period (s) | NW 8 | NW 7 | NW 7 | NW 7 | NW 7 | WNW 6 | NW 6 | NW 6 | NW 6 | NW 7 | NW 7 | NW 7 | NW 7 | NW 7 | NW 7 | NW 8 | NW 8 | NW 8 | NW 7 | NW 7 | NW 7 | NW 7 | NW 7 | NW 7 |
| kJ | 14 | 14 | 12 | 12 | 11 | 16 | 20 | 14 | 11 | 15 | 16 | 30 | 30 | 31 | 32 | 35 | 36 | 35 | 34 | 27 | 26 | 18 | 18 | 18 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | W 10 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 42 | 42 | 42 | 172 | 298 | 434 | 434 | 42 | 42 | 40 | 40 | 40 | 40 | 40 | 40 | 16 | 16 | 16 | 16 | 40 | 40 | 40 | 40 | 40 |
Best forecast wave conditions in Londonderry | ||||||||||||||||||||||||
Best forecast wave conditions in Ireland | ||||||||||||||||||||||||
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