Castlerock Surf Forecast

/ Londonderry (4 surf breaks) /

Ireland (149 surf breaks) / Lat Long: (55.17° N 6.78° W)

Surf Forecasts:

Castlerock surfForecast / Londonderry / Ireland

48hr Weather and Surf, issued 6 am Sunday 14 Sep 2025 BST

Forecast update in hr min s Forecast update imminent

Castlerock surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.

Today's Castlerock sea temperature is 15.3° C
(Which is 1.4°C warmer than normal for this time of year)

How big are the waves at Castlerock today?

The current surf forecast for Castlerock at 1PM is: 0.7m 11s primary swell from a Northwest direction (forecast issued at 06:00am September 14). An open ocean swell of 0.6m 3s is not directed at the surf break. The wind direction is predicted to be cross-offshore.

Time (BST) & Date	Wave Height	Wave Period
Morning (14 Sep)	3ft (0.9m)	11s
Afternoon (14 Sep)	2.5ft (0.7m)	10s
Evening (14 Sep)	1.5ft (0.4m)	10s

Table - waves today at Castlerock. (Swell directed towards the surf break)

Updates in hr min s Forecast update imminent

12 Days Hourly

Print Table

	Sunday 14							Monday 15								Tuesday 16								Wed 17
	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	1 AM
Rating (10 max)	2	2	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	0	1	1
Swell Height Map See all maps
Wave Height (m) & direction (?)	NW	WNW	NW	NW	WNW	WNW	WNW	WNW	NW	NW	WNW	WNW	WNW	WNW	WNW	NW	NW	NW	NW	NW	NW	NW	WNW	WNW
Period(s) (?)	12	11	11	11	10	10	10	10	9	9	14	14	13	8	9	8	12	7	7	6	11	10	10	10
Wave Graph (?)
kJ (?)	319	227	172	119	71	38	38	36	22	21	69	149	793	541	577	313	683	173	173	120	334	216	116	85
Wind (km/h)	SSW	SSE	SSE	SE	SE	SSE	S	S	SSW	SW	W	WNW	WNW	W	WNW	WNW	W	W	W	W	WNW	W	WSW	S
Wind State (?) onshore cross-onshore cross-shore cross-offshore offshore glassy	off	off	off	cross- off	cross- off	cross- off	off	off	cross- off	cross- off	cross	cross	cross	cross	cross	cross	cross	cross	cross	cross	cross	cross	cross- off	off
High Tide / height (m)				11:13AM 1.37				12:00AM 1.17				1:00PM 1.26					2:25AM 1.07				3:16PM 1.34
Low Tide / height (m)		5:02AM 0.54				5:59PM 0.57				6:24AM 0.67					8:16PM 0.64				8:33AM 0.67					10:15PM 0.55

	Sunday 14							Monday 15								Tuesday 16								Wed 17
Sunrise	-	6:56	-	-	-	-	-	-	-	6:58	-	-	-	-	-	-	-	-	7:00	-	-	-	-	-
Sunset	-	-	-	-	-	7:47	-	-	-	-	-	-	-	7:45	-	-	-	-	-	-	-	7:43	-	-

Rain (mm)	-	-	-	3	7	4	-	2	1	-	1	-	1	1	3	1	1	1	-	1	-	-	-	-
Temp. °C	13	11	11	11	13	13	13	12	13	13	14	15	14	13	13	13	13	12	13	14	14	13	12	12
Feels °C (?)	11	8	6	4	5	9	9	9	9	10	8	9	7	4	5	6	7	5	6	8	8	9	10	10

Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)
Wind Speed (km/h)

Recent Eyeball Surf Reports for Londonderry

Wind Update The wind is still offshore at Castlerock (moderate winds from the SSE at Magilligan Number 2 11 km from Castlerock). A 1.1m groundswell from the NW
41 minutes ago Castlerock

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Actual: 41 min ago

28 km/h

SSE

Offshore

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