Surf Forecasts:
How big are the waves at Castlerock today (16 Aug):
- Morning surf: Morning surf (16 Aug, local time) - 2.5ft (0.7m), 8s period with NW swell.
- Afternoon surf: Afternoon surf (16 Aug, local time) - 2ft (0.6m), 8s period with NW swell.
- Evening surf: Evening surf (16 Aug, local time) - 1.5ft (0.4m), 7s period with NW swell.
The current surf forecast for Castlerock at 8PM is: 0.4m 7s primary swell from a Northwest direction and 0.1m 8s secondary swell from a North direction (forecast issued at 12:00pm August 16). The wind direction is predicted to be offshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (16 Aug) | 2.5ft (0.7m) | 8s |
| Afternoon (16 Aug) | 2ft (0.6m) | 8s |
| Evening (16 Aug) | 1.5ft (0.4m) | 7s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Short Range ForecastModerate rain (total 19mm), heaviest on Mon afternoon. Very mild (max 16°C on Mon morning, min 13°C on Sun morning). Wind will be generally light. | |||||||||||||||||||||
Sun 16 | Monday 17 | Tuesday 18 | |||||||||||||||||||
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 8 | NW 7 | NW 7 | NW 7 | WNW 10 | WNW 10 | NW 7 | NW 7 | NW 7 | NW 6 | NW 6 | WNW 6 | WNW 6 | WNW 6 | WNW 6 | WNW 8 | NW 8 | WNW 10 | NW 12 | NW 11 |
Wave Graph  | |||||||||||||||||||||
 kJ | 58 | 35 | 34 | 34 | 19 | 18 | 18 | 8 | 8 | 7 | 6 | 6 | 4 | 30 | 24 | 27 | 39 | 70 | 204 | 568 | 530 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | off | off | glassy | glassy | glassy | off | cross-off | off | off | cross-off | cross | cross | cross | cross-off | cross | cross-off | cross | cross-off |
High Tide | 8:54AM1.59m | 9:23PM1.87m | 9:28AM1.53m | 9:56PM1.68m | 10:01AM1.44m | ||||||||||||||||
Low Tide | 3:09PM0.05m | 3:52AM0.28m | 3:45PM0.18m | 4:23AM0.40m | 4:23PM0.35m | ||||||||||||||||
 | | | |  |  | |  | | | | | | | | | | | |  |  | |
 | 6:01 | — | — | — | — | — | 6:03 | — | — | — | — | — | — | — | 6:05 | — | — | — | — | — | — |
 | — | — | — | 8:59 | — | — | — | — | — | — | — | 8:57 | — | — | — | — | — | — | — | 8:54 | — |
mm | 1 | 1 | 1 | 2 | 1 | — | — | — | — | 1 | 2 | 4 | 3 | — | — | — | — | — | — | — | — |
Temp °C | 13 | 13 | 13 | 13 | 13 | 14 | 14 | 15 | 16 | 16 | 16 | 15 | 16 | 15 | 15 | 14 | 15 | 16 | 16 | 16 | 13 |
Feels °C | 11 | 11 | 11 | 12 | 12 | 15 | 15 | 16 | 16 | 15 | 15 | 14 | 14 | 11 | 11 | 10 | 11 | 12 | 12 | 12 | 9 |
Swell 1 Height (m) Direction Period (s) | NW 8 | NW 8 | NW 7 | NW 7 | NW 7 | NW 7 | NW 7 | NW 7 | NW 7 | NW 7 | NW 6 | NW 6 | WNW 6 | N 7 | N 7 | — | WNW 8 | NW 8 | WNW 10 | NW 12 | NW 11 |
| kJ | 58 | 35 | 34 | 34 | 19 | 13 | 7 | 7 | 7 | 7 | 6 | 6 | 4 | 1 | 1 | — | 39 | 70 | 204 | 568 | 530 |
Swell 2 Height (m) Direction Period (s) | — | — | N 8 | N 8 | W 9 | WNW 10 | WNW 10 | WNW 9 | WNW 9 | W 9 | W 8 | W 8 | W 8 | — | — | — | — | — | — | — | — |
| kJ | — | — | 1 | 1 | 6 | 18 | 18 | 8 | 8 | 6 | 6 | 1 | 1 | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | N 8 | N 8 | N 8 | N 8 | N 7 | N 7 | N 7 | N 7 | N 7 | N 7 | — | — | — | — | — | — | — |
| kJ | — | — | — | — | 5 | 5 | 5 | 4 | 1 | 1 | 1 | 1 | 1 | 1 | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | WNW 6 | WNW 6 | WNW 6 | WSW 3 | WSW 3 | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | 30 | 24 | 27 | 1 | 1 | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 8 | 27 | 40 | 40 | 40 | 40 | 14 | 40 | 42 | 42 | 42 | 40 | 336 | 336 | 357 | 336 | 187 | 300 | 1263 | 404 | 9 |
Best forecast wave conditions in Londonderry | |||||||||||||||||||||
Best forecast wave conditions in Ireland | |||||||||||||||||||||
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