Surf Forecasts:
How big are the waves at Castlerock today (14 Aug):
- Morning surf: Morning surf (14 Aug, local time) - 0.5ft (0.2m), 9s period with W swell.
- Afternoon surf: Afternoon surf (14 Aug, local time) - 1.5ft (0.4m), 3s period with WNW swell.
- Evening surf: Evening surf (14 Aug, local time) - 1.5ft (0.5m), 5s period with NW swell.
The current surf forecast for Castlerock at 6PM is: 0.5m 3s primary swell from a Northwest direction and 0.1m 9s secondary swell from a West direction (forecast issued at 12:00pm August 14). The wind direction is predicted to be cross-onshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (14 Aug) | 0.5ft (0.2m) | 9s |
| Afternoon (14 Aug) | 1.5ft (0.4m) | 3s |
| Evening (14 Aug) | 1.5ft (0.5m) | 5s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Short Range ForecastLight rain (total 3mm), mostly falling on Sat night. Very mild (max 17°C on Fri afternoon, min 11°C on Sat night). Wind will be generally light. | |||||||||||||||||||||
Fri 14 | Saturday 15 | Sunday 16 | |||||||||||||||||||
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) | W 9 | W 9 | WNW 3 | NW 4 | NW 5 | NW 5 | NW 5 | NW 5 | NW 9 | NW 8 | NW 8 | NW 8 | NW 8 | NW 8 | NW 8 | NW 8 | NW 8 | NW 8 | NW 7 | NW 7 | NW 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 7 | 6 | 4 | 6 | 13 | 16 | 15 | 17 | 77 | 82 | 80 | 78 | 93 | 93 | 78 | 63 | 57 | 35 | 34 | 26 | 19 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross | cross-on | cross-on | cross-on | cross-on | cross | cross | cross-on | cross-on | cross-on | cross | cross-off | cross-off | off | off | off | off | off | cross-off |
High Tide | 7:45AM1.66m | 8:12PM2.10m | 8:20AM1.64m | 8:48PM2.02m | 8:54AM1.59m | 9:23PM1.87m | |||||||||||||||
Low Tide | 1:58PM-0.07m | 2:47AM0.09m | 2:34PM-0.04m | 3:21AM0.17m | 3:09PM0.05m | ||||||||||||||||
 | | |  |  |  | | | | | |  | | | |  | | | | | | |
 | 5:56 | — | — | — | — | — | 5:58 | — | — | — | — | — | — | — | 6:01 | — | — | — | — | — | — |
 | — | — | — | 9:04 | — | — | — | — | — | — | — | 9:01 | — | — | — | — | — | — | — | 8:59 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 1 | — | 1 | — | — |
Temp °C | 15 | 16 | 17 | 16 | 14 | 13 | 13 | 12 | 14 | 15 | 15 | 14 | 13 | 12 | 12 | 11 | 12 | 13 | 13 | 15 | 15 |
Feels °C | 13 | 13 | 13 | 13 | 12 | 10 | 10 | 9 | 11 | 11 | 11 | 11 | 11 | 10 | 10 | 9 | 9 | 11 | 11 | 14 | 13 |
Swell 1 Height (m) Direction Period (s) | W 9 | W 9 | W 9 | W 9 | W 9 | W 9 | WNW 9 | WNW 9 | — | — | — | NW 8 | NW 8 | NW 8 | NW 8 | NW 8 | NW 8 | NW 8 | NW 7 | NW 7 | NW 7 |
| kJ | 7 | 6 | 2 | 2 | 1 | 2 | 8 | 16 | — | — | — | 78 | 93 | 93 | 78 | 63 | 57 | 35 | 34 | 26 | 19 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | N 8 | N 8 | WNW 8 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 5 | 14 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | N 8 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 5 |
Wind waves Height (m) Direction Period (s) | NW 3 | NW 3 | WNW 3 | NW 4 | NW 5 | NW 5 | NW 5 | NW 5 | NW 9 | NW 8 | NW 8 | — | — | — | — | — | — | — | — | — | — |
| kJ | 2 | 2 | 4 | 6 | 13 | 16 | 15 | 17 | 77 | 82 | 80 | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 398 | 398 | 398 | 434 | 441 | 398 | 187 | 27 | 187 | 771 | 1289 | 27 | 9 | 0 | 0 | 0 | 8 | 16 | 40 | 42 | 42 |
Best forecast wave conditions in Londonderry | |||||||||||||||||||||
Best forecast wave conditions in Ireland | |||||||||||||||||||||
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