Surf Forecasts:
How big are the waves at Castlerock today (13 Oct):
- Afternoon surf: Afternoon surf (13 Oct, local time) - 6.5ft (2.0m), 9s period with WNW swell.
- Evening surf: Evening surf (13 Oct, local time) - 5ft (1.6m), 12s period with NW swell.
The current surf forecast for Castlerock at 11PM is: 1.6m 12s primary swell from a Northwest direction and 1.0m 12s secondary swell from a Northwest direction (forecast issued at 06:00pm October 13). The wind direction is predicted to be offshore and the swell rating is 4.
| Time (BST) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (13 Oct) | - | - |
| Afternoon (13 Oct) | 6.5ft (2.0m) | 9s |
| Evening (13 Oct) | 5ft (1.6m) | 12s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Short Range ForecastHeavy rain (total 29mm), heaviest during Wed night. Very mild (max 16°C on Wed afternoon, min 9°C on Tue night). Winds decreasing (strong winds from the W on Tue afternoon, light winds from the N by Wed night). | |||||||||||||||||||
Tue 13 | Wednesday 14 | Thursday 15 | |||||||||||||||||
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 9 | WNW 10 | NW 12 | NW 12 | NW 12 | NW 12 | NW 12 | NW 13 | WNW 13 | WNW 14 | NW 16 | NW 17 | NW 16 | NW 15 | NW 15 | NW 15 | NW 14 | NW 13 | NW 13 |
Wave Graph  | |||||||||||||||||||
 kJ | 644 | 670 | 760 | 700 | 561 | 448 | 361 | 418 | 444 | 934 | 1394 | 2296 | 2133 | 1585 | 1343 | 1959 | 1754 | 1482 | 1210 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross-off | off | off | off | off | off | off | off | off | cross-on | on | on | cross | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 8:12PM1.66m | 8:26AM1.68m | 8:40PM1.51m | 8:57AM1.59m | 9:08PM1.37m | ||||||||||||||
Low Tide | 2:15PM0.17m | 2:24AM0.25m | 2:48PM0.29m | 2:49AM0.35m | 3:23PM0.43m | ||||||||||||||
 |  |  | | | |  | | |  |  | | | | | | | | | |
 | — | — | — | — | — | 7:52 | — | — | — | — | — | — | — | 7:54 | — | — | — | — | — |
 | 6:34 | — | — | — | — | — | — | — | 6:30 | — | — | — | — | — | — | — | 6:29 | — | — |
mm | — | — | — | — | — | — | — | — | — | 1 | 6 | 6 | 8 | 8 | — | — | — | — | — |
Temp °C | 12 | 12 | 11 | 11 | 9 | 10 | 13 | 15 | 16 | 15 | 12 | 12 | 11 | 11 | 11 | 12 | 12 | 11 | 10 |
Feels °C | 3 | 6 | 6 | 6 | 4 | 4 | 7 | 7 | 8 | 8 | 10 | 11 | 8 | 7 | 6 | 7 | 7 | 7 | 6 |
Swell 1 Height (m) Direction Period (s) | — | WNW 10 | NW 12 | NW 12 | NW 12 | NW 12 | NW 12 | NW 13 | WNW 13 | WNW 14 | NW 16 | NW 17 | NW 16 | NW 15 | NW 15 | NW 15 | NW 14 | NW 13 | NW 13 |
| kJ | — | 670 | 760 | 700 | 561 | 448 | 361 | 418 | 444 | 934 | 1394 | 2296 | 2133 | 1585 | 1343 | 1959 | 1754 | 1482 | 1210 |
Swell 2 Height (m) Direction Period (s) | — | NW 12 | NW 12 | — | — | — | — | NW 13 | — | — | S 4 | — | — | — | NNW 18 | — | — | — | — |
| kJ | — | 184 | 301 | — | — | — | — | 215 | — | — | 2 | — | — | — | 408 | — | — | — | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | ESE 4 | — | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | — | — | — | 2 | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | WNW 9 | — | — | SSW 2 | S 3 | SSE 3 | SSE 3 | SSE 4 | S 4 | S 4 | S 4 | — | — | — | — | — | — | — | — |
| kJ | 644 | — | — | 1 | 1 | 3 | 9 | 14 | 14 | 10 | 7 | — | — | — | — | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 380 | 387 | 0 | 0 | 0 | 348 | 492 | 690 | 690 | 492 | 27 | 9 | 240 | 387 | 27 | 9 | 180 | 9 | 9 |
Best forecast wave conditions in Londonderry | |||||||||||||||||||
Best forecast wave conditions in Ireland | |||||||||||||||||||
Header Global | |||||||||||||||||||
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