Surf Forecasts:
How big are the waves at Castlerock today (16 Oct):
- Morning surf: Morning surf (16 Oct, local time) - 5.5ft (1.7m), 11s period with NW swell.
- Afternoon surf: Afternoon surf (16 Oct, local time) - 5ft (1.6m), 11s period with NW swell.
- Evening surf: Evening surf (16 Oct, local time) - 4.5ft (1.4m), 10s period with NW swell.
The current surf forecast for Castlerock at 6PM is: 1.6m 10s primary swell from a Northwest direction and 0.7m 12s secondary swell from a West-northwest direction, 0.3m 14s secondary swell from a North-northwest direction (forecast issued at 12:00pm October 16). The wind direction is predicted to be cross-onshore.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (16 Oct) | 5.5ft (1.7m) | 11s |
| Afternoon (16 Oct) | 5ft (1.6m) | 11s |
| Evening (16 Oct) | 4.5ft (1.4m) | 10s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Short Range ForecastLight rain (total 3mm), mostly falling on Fri morning. Very mild (max 12°C on Fri afternoon, min 7°C on Sun night). Winds decreasing (fresh winds from the NNW on Fri afternoon, calm by Sun afternoon). | |||||||||||||||||||||
Fri 16 | Saturday 17 | Sunday 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 11 | NW 11 | NW 11 | NW 10 | NNW 10 | NNW 9 | NNW 8 | NW 13 | NW 12 | NW 12 | NW 12 | NW 11 | NW 11 | NW 11 | NW 11 | NW 11 | NW 10 | NW 10 | NW 15 | NW 14 | WNW 13 |
Wave Graph  | |||||||||||||||||||||
 kJ | 640 | 688 | 561 | 490 | 356 | 244 | 177 | 193 | 149 | 169 | 224 | 183 | 177 | 147 | 114 | 110 | 85 | 80 | 79 | 100 | 156 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-on | cross-on | cross-on | on | on | on | cross-on | cross-on | glassy | glassy | glassy | cross-off | off | off | off | off | glassy | glassy | cross-off | off |
High Tide | 9:31AM1.46m | 9:39PM1.23m | 10:14AM1.32m | 10:16PM1.09m | 11:22AM1.20m | ||||||||||||||||
Low Tide | 4:05PM0.58m | 3:50AM0.56m | 5:08PM0.73m | 4:51AM0.66m | 7:02PM0.81m | ||||||||||||||||
 | | |  | |  |  | |  | |  | | | | | | | | | | | |
 | 7:56 | — | — | — | — | — | — | 7:58 | — | — | — | — | — | — | — | 8:00 | — | — | — | — | — |
 | — | — | 6:25 | — | — | — | — | — | — | — | 6:23 | — | — | — | — | — | — | — | 6:22 | — | — |
mm | 1 | 1 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 10 | 11 | 12 | 11 | 11 | 11 | 10 | 9 | 9 | 10 | 10 | 10 | 9 | 9 | 8 | 8 | 8 | 9 | 10 | 10 | 9 |
Feels °C | 6 | 5 | 5 | 5 | 5 | 6 | 7 | 6 | 7 | 9 | 9 | 9 | 7 | 7 | 5 | 5 | 6 | 7 | 9 | 8 | 6 |
Swell 1 Height (m) Direction Period (s) | NW 11 | — | WNW 12 | WNW 12 | NW 12 | NNW 9 | NNW 8 | NNW 8 | NNW 9 | NW 12 | NW 12 | NW 11 | NW 11 | NW 11 | NW 11 | NW 11 | NW 10 | NW 10 | NW 10 | NW 14 | WNW 13 |
| kJ | 640 | — | 129 | 127 | 137 | 244 | 177 | 110 | 124 | 169 | 224 | 183 | 177 | 147 | 114 | 110 | 85 | 80 | 79 | 100 | 156 |
Swell 2 Height (m) Direction Period (s) | — | — | — | NNW 14 | NNW 14 | NW 12 | NW 12 | NW 13 | NW 12 | NNW 7 | NNW 8 | N 9 | N 9 | N 9 | — | — | W 18 | WNW 16 | NW 15 | NW 10 | N 9 |
| kJ | — | — | — | 41 | 63 | 142 | 142 | 193 | 149 | 42 | 12 | 6 | 6 | 2 | — | — | 6 | 26 | 60 | 47 | 1 |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | NNW 13 | NNW 13 | N 13 | N 13 | NNW 9 | N 12 | — | — | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | 59 | 58 | 31 | 30 | 16 | 12 | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | NW 11 | NW 11 | NW 10 | NNW 10 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | — | 688 | 561 | 490 | 356 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 336 | 439 | 441 | 334 | 157 | 131 | 71 | 71 | 18 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Best forecast wave conditions in Londonderry | |||||||||||||||||||||
Best forecast wave conditions in Ireland | |||||||||||||||||||||
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