Surf Forecasts:
How big are the waves at Castlerock today (27 Oct):
- Morning surf: Morning surf (27 Oct, local time) - 8ft (2.4m), 14s period with WNW swell.
- Afternoon surf: Afternoon surf (27 Oct, local time) - 8ft (2.5m), 14s period with NW swell.
- Evening surf: Evening surf (27 Oct, local time) - 8ft (2.5m), 13s period with NW swell.
The current surf forecast for Castlerock at 11AM is: 2.5m 14s primary swell from a West-northwest direction (forecast issued at 05:00am October 27). An open ocean swell of 0.5m 4s is not directed at the surf break. The wind direction is predicted to be cross-offshore.
| Time (GMT) & Date | Wave Height | Wave Period |
|---|---|---|
| Morning (27 Oct) | 8ft (2.4m) | 14s |
| Afternoon (27 Oct) | 8ft (2.5m) | 14s |
| Evening (27 Oct) | 8ft (2.5m) | 13s |
Table - waves today at Castlerock. (Swell directed towards the surf break)
Short Range ForecastModerate rain (total 11mm), heaviest on Tue night. Very mild (max 14°C on Wed morning, min 9°C on Tue afternoon). Winds decreasing (strong winds from the WSW on Tue morning, light winds from the S by Wed afternoon). | |||||||||||||||||||||||
Tuesday 27 | Wednesday 28 | Thursday 29 | |||||||||||||||||||||
3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 12 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | 12 AM | 3 AM | 6 AM | 9 AM | 12 PM | 3 PM | 6 PM | 9 PM | |
Swell Height Map |  |  |  |  |  |  |  |  |  | ||||||||||||||
Wave Height (m) Direction Period (s) | WNW 12 | WNW 12 | WNW 14 | WNW 14 | NW 14 | NW 14 | NW 13 | NW 13 | NW 12 | NW 12 | NW 12 | NW 11 | NW 11 | NW 11 | NW 11 | NW 11 | NW 10 | NW 10 | NW 10 | NW 10 | NW 9 | WNW 14 | WNW 14 |
Wave Graph  | |||||||||||||||||||||||
 kJ | 222 | 566 | 2129 | 3408 | 2679 | 2664 | 2429 | 2121 | 1721 | 1539 | 1111 | 898 | 802 | 671 | 553 | 441 | 296 | 251 | 188 | 136 | 71 | 104 | 178 |
Wind (km/h) | |||||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | off | off | off | off | off | off | off | off | off | off |
High Tide | 6:10AM1.82m | 6:28PM1.90m | 6:48AM1.84m | 7:08PM1.79m | 7:29AM1.80m | 7:51PM1.63m | |||||||||||||||||
Low Tide | 00:11AM0.05m | 12:21PM0.06m | 00:44AM0.08m | 1:02PM0.09m | 1:19AM0.16m | 1:49PM0.19m | |||||||||||||||||
 |  |  |  |  |  | | | | |  |  | | | | | |  | | | | | | |
 | — | 7:18 | — | — | — | — | — | — | — | 7:20 | — | — | — | — | — | — | — | 7:24 | — | — | — | — | — |
 | — | — | — | — | 5:00 | — | — | — | — | — | — | — | 4:59 | — | — | — | — | — | — | — | 4:55 | — | — |
mm | — | — | 1 | — | 1 | 1 | — | — | 2 | 4 | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 10 | 10 | 10 | 10 | 10 | 9 | 9 | 10 | 12 | 12 | 12 | 14 | 14 | 13 | 12 | 12 | 11 | 10 | 10 | 12 | 13 | 12 | 11 |
Feels °C | -1 | -2 | 0 | 1 | 2 | 1 | 2 | 2 | 5 | 6 | 6 | 9 | 10 | 10 | 9 | 9 | 7 | 6 | 5 | 6 | 7 | 6 | 5 |
Swell 1 Height (m) Direction Period (s) | WNW 12 | WNW 12 | WNW 14 | WNW 14 | NW 14 | NW 14 | NW 13 | NW 13 | NW 12 | NW 12 | NW 12 | NW 11 | NW 11 | NW 11 | NW 11 | NW 11 | NW 10 | NW 10 | NW 10 | NW 10 | NW 9 | WNW 14 | WNW 14 |
| kJ | 222 | 566 | 2129 | 3408 | 2679 | 2664 | 2429 | 2121 | 1721 | 1539 | 1111 | 898 | 802 | 671 | 553 | 441 | 296 | 251 | 188 | 136 | 71 | 104 | 178 |
Swell 2 Height (m) Direction Period (s) | NNW 8 | N 8 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | W 10 | WNW 11 | NW 9 | NW 9 |
| kJ | 7 | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 53 | 47 | 41 | 21 |
Swell 3 Height (m) Direction Period (s) | ESE 8 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| kJ | 6 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | S 4 | SSW 4 | WSW 4 | SW 4 | WSW 4 | WSW 4 | SW 4 | SSW 3 | SW 3 | — | WSW 3 | WSW 3 | — | — | — | S 2 | — | SSE 2 | SE 3 | SSE 3 | SSE 3 | SE 4 | SE 4 |
| kJ | 17 | 30 | 40 | 7 | 22 | 16 | 10 | 7 | 9 | — | 9 | 6 | — | — | — | 1 | — | 1 | 2 | 3 | 7 | 14 | 24 |
Nearest Offshore or Glassy | |||||||||||||||||||||||
Distance (km) | 1057 | 1092 | 794 | 1037 | 1263 | 601 | 601 | 559 | 559 | 387 | 387 | 9 | 9 | 0 | 0 | 0 | 0 | 0 | 0 | 25 | 390 | 390 | 390 |
Best forecast wave conditions in Londonderry | |||||||||||||||||||||||
Best forecast wave conditions in Ireland | |||||||||||||||||||||||
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