Surf Forecasts:
How big are the waves at Castlerock today (27 Aug):
- Morning surf: Morning surf (27 Aug, local time) - 1.5ft (0.4m), 9s period with NW swell.
- Afternoon surf: Afternoon surf (27 Aug, local time) - 1.5ft (0.4m), 9s period with NW swell.
- Evening surf: Evening surf (27 Aug, local time) - 1ft (0.3m), 9s period with WNW swell.
The current surf forecast for Castlerock at 6PM is: 0.4m 9s primary swell from a Northwest direction and 0.4m 4s secondary swell from a East-northeast direction (forecast issued at 12:00pm August 27). The wind direction is predicted to be cross-onshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (27 Aug) | 1.5ft (0.4m) | 9s |
| Afternoon (27 Aug) | 1.5ft (0.4m) | 9s |
| Evening (27 Aug) | 1ft (0.3m) | 9s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Short Range ForecastLight rain (total 4mm), mostly falling on Sat afternoon. Warm (max 20°C on Thu afternoon, min 13°C on Fri night). Wind will be generally light. | |||||||||||||||||||||
Thu 27 | Friday 28 | Saturday 29 | |||||||||||||||||||
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 9 | NW 9 | NW 9 | WNW 9 | WNW 9 | WNW 8 | WNW 8 | WNW 8 | WNW 8 | NW 4 | NNW 3 | NNW 4 | NNW 5 | NNW 5 | NNW 5 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | NNW 7 | NNW 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 22 | 21 | 20 | 16 | 7 | 7 | 7 | 6 | 6 | 4 | 4 | 12 | 20 | 17 | 17 | 21 | 22 | 23 | 24 | 25 | 25 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross | cross-on | cross-on | cross-on | glassy | glassy | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | on | on | cross-on | cross-on | cross |
High Tide | 6:51PM1.84m | 6:54AM1.61m | 7:18PM1.92m | 7:24AM1.66m | 7:47PM1.96m | ||||||||||||||||
Low Tide | 12:45PM0.12m | 1:22AM0.22m | 1:12PM0.06m | 1:49AM0.17m | 1:39PM0.03m | ||||||||||||||||
 | |  | |  | | |  | | | | |  | | | | |  | |  | | |
 | 6:22 | — | — | — | — | — | 6:24 | — | — | — | — | — | — | — | 6:26 | — | — | — | — | — | — |
 | — | — | — | 8:32 | — | — | — | — | — | — | — | 8:30 | — | — | — | — | — | — | — | 8:28 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 2 | 1 | — |
Temp °C | 16 | 18 | 20 | 19 | 17 | 16 | 16 | 16 | 16 | 16 | 16 | 16 | 14 | 14 | 13 | 14 | 14 | 14 | 14 | 14 | 14 |
Feels °C | 15 | 16 | 18 | 18 | 17 | 16 | 17 | 17 | 15 | 13 | 12 | 14 | 12 | 13 | 12 | 14 | 13 | 13 | 13 | 13 | 13 |
Swell 1 Height (m) Direction Period (s) | NW 9 | NW 9 | NW 9 | WNW 9 | WNW 9 | WNW 8 | N 4 | NNW 4 | NNW 4 | NW 8 | NW 7 | NW 7 | NNW 5 | NNW 5 | NNW 5 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | NNW 7 | NNW 7 |
| kJ | 22 | 21 | 20 | 16 | 7 | 7 | 3 | 3 | 2 | 2 | 2 | 2 | 20 | 17 | 17 | 21 | 22 | 23 | 24 | 25 | 25 |
Swell 2 Height (m) Direction Period (s) | — | — | — | — | — | N 4 | WNW 8 | ENE 3 | ENE 3 | — | NW 8 | NW 8 | W 7 | W 7 | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | 1 | 7 | 1 | 1 | — | 2 | 2 | 1 | 1 | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | WNW 8 | WNW 8 | NW 8 | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | 6 | 6 | 2 | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | ENE 4 | ENE 4 | ENE 4 | ENE 3 | NE 3 | NE 3 | ENE 3 | — | — | NW 4 | NNW 3 | NNW 4 | — | — | — | — | — | — | — | — | — |
| kJ | 4 | 4 | 4 | 5 | 6 | 3 | 2 | — | — | 4 | 4 | 12 | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 40 | 40 | 63 | 40 | 251 | 254 | 303 | 303 | 282 | 303 | 283 | 282 | 270 | 282 | 40 | 40 | 79 | 97 | 300 | 334 | 44 |
Best forecast wave conditions in Londonderry | |||||||||||||||||||||
Best forecast wave conditions in Ireland | |||||||||||||||||||||
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