Surf Forecasts:
How big are the waves at Castlerock today (17 Oct):
- Morning surf: Morning surf (17 Oct, local time) - 2.5ft (0.8m), 12s period with NW swell.
- Afternoon surf: Afternoon surf (17 Oct, local time) - 3ft (0.9m), 12s period with NW swell.
- Evening surf: Evening surf (17 Oct, local time) - 2.5ft (0.8m), 11s period with NW swell.
The current surf forecast for Castlerock at 7PM is: 0.8m 11s primary swell from a Northwest direction and 0.2m 9s secondary swell from a North direction (forecast issued at 12:00pm October 17). The wind direction is predicted to be glassy.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (17 Oct) | 2.5ft (0.8m) | 12s |
| Afternoon (17 Oct) | 3ft (0.9m) | 12s |
| Evening (17 Oct) | 2.5ft (0.8m) | 11s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Short Range ForecastMostly dry. Very mild (max 11°C on Mon afternoon, min 7°C on Sat night). Wind will be generally light. | |||||||||||||||||||||
Sat 17 | Sunday 18 | Monday 19 | |||||||||||||||||||
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 12 | NW 12 | NW 12 | NW 11 | NW 11 | NW 11 | NW 11 | NW 11 | NW 10 | NW 10 | NW 15 | WNW 14 | WNW 13 | WNW 13 | WNW 13 | NW 16 | NW 16 | NW 16 | NW 15 | NW 15 | NW 14 |
Wave Graph  | |||||||||||||||||||||
 kJ | 149 | 169 | 224 | 183 | 177 | 147 | 114 | 110 | 85 | 80 | 65 | 134 | 154 | 96 | 55 | 208 | 352 | 603 | 704 | 677 | 813 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | cross | glassy | off | off | off | off | off | off | glassy | cross-off | cross-off | off | off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 10:14AM1.32m | 10:16PM1.09m | 11:22AM1.20m | 11:25PM0.98m | 2:03PM1.18m | ||||||||||||||||
Low Tide | 5:08PM0.73m | 4:51AM0.66m | 7:02PM0.81m | 6:52AM0.71m | 8:58PM0.76m | ||||||||||||||||
 | | |  | | | | | | | | | | | | | |  | | | | |
 | 7:58 | — | — | — | — | — | — | 8:00 | — | — | — | — | — | — | — | 8:03 | — | — | — | — | — |
 | — | — | 6:23 | — | — | — | — | — | — | — | 6:22 | — | — | — | — | — | — | — | 6:19 | — | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 9 | 9 | 9 | 9 | 8 | 8 | 7 | 7 | 7 | 8 | 10 | 9 | 9 | 8 | 8 | 8 | 8 | 10 | 11 | 11 | 9 |
Feels °C | 6 | 6 | 7 | 7 | 5 | 5 | 4 | 4 | 4 | 6 | 8 | 6 | 6 | 5 | 4 | 4 | 5 | 6 | 7 | 7 | 5 |
Swell 1 Height (m) Direction Period (s) | NNW 9 | NW 12 | NW 12 | NW 11 | NW 11 | NW 11 | NW 11 | NW 11 | NW 10 | NW 10 | WNW 10 | WNW 14 | WNW 13 | WNW 13 | WNW 13 | NW 16 | NW 16 | NW 16 | NW 15 | NW 15 | NW 14 |
| kJ | 124 | 169 | 224 | 183 | 177 | 147 | 114 | 110 | 85 | 80 | 65 | 134 | 154 | 96 | 55 | 208 | 352 | 603 | 704 | 677 | 813 |
Swell 2 Height (m) Direction Period (s) | NW 12 | NNW 7 | NNW 8 | N 9 | N 9 | N 9 | — | — | W 17 | NW 16 | NW 15 | NW 10 | NW 20 | NW 18 | NW 17 | WNW 12 | — | — | — | — | E 4 |
| kJ | 149 | 48 | 12 | 6 | 6 | 2 | — | — | 6 | 11 | 60 | 47 | 15 | 12 | 47 | 48 | — | — | — | — | 7 |
Swell 3 Height (m) Direction Period (s) | N 13 | NNW 9 | N 12 | — | — | — | — | — | — | — | — | — | — | N 9 | — | — | — | — | — | — | — |
| kJ | 30 | 16 | 12 | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | E 3 | E 4 | E 4 |
| kJ | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 3 | 6 | 7 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 40 | 40 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 2 | 2 |
Best forecast wave conditions in Londonderry | |||||||||||||||||||||
Best forecast wave conditions in Ireland | |||||||||||||||||||||
Header Global | |||||||||||||||||||||
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