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 6AM is: 0.4m 10s primary swell from a Northwest direction and 0.1m 7s secondary swell from a Northwest direction, 0.4m 3s secondary swell from a East-northeast direction (forecast issued at 12:00am August 27). The wind direction is predicted to be cross-offshore.
| 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 ForecastModerate rain (total 11mm), heaviest on Sat afternoon. Warm (max 20°C on Thu afternoon, min 13°C on Fri night). Wind will be generally light. | ||||||||||||||||||||||||
Thursday 27 | Friday 28 | Saturday 29 | ||||||||||||||||||||||
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) | WNW 10 | NW 10 | NW 10 | NW 9 | NW 9 | NW 9 | WNW 9 | WNW 9 | NE 4 | WNW 8 | WNW 8 | WNW 8 | NW 3 | NNW 4 | NW 5 | NW 5 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | NNW 7 | NNW 7 |
Wave Graph  | ||||||||||||||||||||||||
 kJ | 19 | 24 | 23 | 22 | 21 | 20 | 16 | 15 | 7 | 7 | 6 | 6 | 2 | 10 | 22 | 28 | 28 | 22 | 20 | 15 | 15 | 17 | 17 | 17 |
Wind (km/h) | ||||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | cross-off | cross | cross | cross-on | cross-on | cross-on | cross-on | glassy | cross | cross-on | cross-on | cross-on | cross-on | cross-on | glassy | glassy | cross-on | cross-on | on | on | cross-on | cross-on |
High Tide | 6:26AM1.53m | 6:51PM1.84m | 6:54AM1.61m | 7:18PM1.92m | 7:24AM1.66m | 7:47PM1.96m | ||||||||||||||||||
Low Tide | 00:54AM0.29m | 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 | 3 | 5 | 2 | — |
Temp °C | 16 | 15 | 14 | 16 | 18 | 20 | 19 | 17 | 16 | 16 | 16 | 16 | 17 | 16 | 16 | 14 | 13 | 13 | 14 | 14 | 14 | 14 | 14 | 14 |
Feels °C | 15 | 14 | 13 | 15 | 16 | 18 | 19 | 16 | 16 | 17 | 16 | 14 | 14 | 13 | 14 | 12 | 13 | 13 | 14 | 13 | 13 | 12 | 11 | 11 |
Swell 1 Height (m) Direction Period (s) | WNW 10 | NW 10 | NW 10 | NW 9 | NW 9 | NW 9 | WNW 9 | WNW 9 | WNW 8 | NE 4 | ENE 3 | NNW 4 | NW 8 | NW 7 | NW 8 | NW 5 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | NNW 6 | NNW 7 | NNW 7 |
| kJ | 19 | 24 | 23 | 22 | 21 | 20 | 16 | 15 | 7 | 3 | 1 | 2 | 2 | 2 | 2 | 28 | 28 | 22 | 20 | 15 | 15 | 17 | 17 | 17 |
Swell 2 Height (m) Direction Period (s) | N 7 | NW 7 | — | N 6 | — | — | — | — | — | WNW 8 | NNW 4 | WNW 8 | — | NW 8 | W 7 | — | — | — | — | — | — | — | — | — |
| kJ | 1 | 2 | — | 1 | — | — | — | — | — | 7 | 1 | 6 | — | 2 | 1 | — | — | — | — | — | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | N 4 | WNW 8 | ENE 3 | NW 8 | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | 1 | 6 | 1 | 2 | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | ENE 3 | ENE 3 | ENE 4 | ENE 4 | ENE 4 | ENE 4 | ENE 4 | ENE 4 | NE 4 | — | — | — | NW 3 | NNW 4 | NW 5 | — | — | — | — | — | — | — | — | — |
| kJ | 2 | 2 | 4 | 4 | 4 | 4 | 7 | 8 | 7 | — | — | — | 2 | 10 | 22 | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | ||||||||||||||||||||||||
Distance (km) | 40 | 40 | 40 | 40 | 40 | 63 | 40 | 109 | 290 | 332 | 303 | 321 | 273 | 273 | 42 | 42 | 40 | 40 | 91 | 254 | 331 | 254 | 254 | 309 |
Best forecast wave conditions in Londonderry | ||||||||||||||||||||||||
Best forecast wave conditions in Ireland | ||||||||||||||||||||||||
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