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Surf Forecasts:

Castlerock surf break

Castlerock surfForecast / Londonderry / Ireland

information circle48hr Weather and Surf, issued 5 am Thursday 19 Mar 2026 GMT
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
8.1° C
 (Which is normal for this time of year)

How big are the waves at Castlerock today?

The current surf forecast for Castlerock at 9AM is: 1.3m 13s primary swell from a Northwest direction (forecast issued at 05:00am March 19). The wind direction is predicted to be glassy and the swell rating is 3.

Time (GMT) & DateWave HeightWave Period
Morning (19 Mar)4.5ft (1.3m)13s
Afternoon (19 Mar)3.5ft (1.1m)12s
Evening (19 Mar)3.5ft (1.0m)12s

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

Updates in  hr  min  s Forecast update imminent 
16 DaysHourly
Print Table
Thursday
19
Friday
20
Saturday
21
Sun
22
3 AM6 AM9 AM12 PM3 PM6 PM9 PM0 AM3 AM6 AM9 AM12 PM3 PM6 PM9 PM0 AM3 AM6 AM9 AM12 PM3 PM6 PM9 PM0 AM
Rating
(10 max)
2
2
3
2
1
2
2
2
1
1
1
2
2
1
3
4
4
4
4
4
5
5
4
4
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
1.4
NW
1.4
NW
1.3
NW
1.3
NW
1.1
NW
1.1
NW
1
NW
0.9
NW
0.8
NW
0.8
NW
0.6
NW
0.6
NW
1.1
NW
1.2
NW
1.2
NW
1.7
NW
1.9
NW
2.1
NW
2.4
NW
2.4
NW
2.5
NW
2.5
NW
2.4
NW
2.3
NW
Period(s) (?)131313131212121211111114131313161615161616161615
Wave
Graph
(?)Metric surfscale
Energy kJ (?)67365351250438636727222818314596155444488480138417382075283129543118304028082307
Wind
(km/h)
10
NNE
10
NNE
5
NE
10
ENE
10
E
10
ESE
15
SSE
15
S
10
S
10
S
10
S
5
SSW
5
N
10
N
5
E
5
S
5
SSW
5
SSW
5
SSW
0
E
5
E
5
SE
15
S
15
S
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
oncross-
on		glasscross-
on		crosscross-
off		cross-
off		offoffoffoffoffononglassglasscross-
off		cross-
off		glassglassglassglassoffoff
High Tide
/ height (m)
6:07AM
2.04
6:20PM
1.76
6:40AM
2.07
6:54PM
1.79
7:15AM
2.03
7:29PM
1.78
Low Tide
/ height (m)
12:37PM
0.04
12:30AM
-0.03
1:06PM
0.02
1:02AM
-0.03
1:36PM
0.07
Thursday
19
Friday
20
Saturday
21
Sun
22
Sunrise--6:33-------6:30-------6:28-----
Sunset-----6:37-------6:38-------6:40--
clear
part cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
Rain (mm)
------------------------
Temp. °C8881012121111109913131199878101111109
Feels °C (?)55679988766121198765699975
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
Map placeholder

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FREE! Surf-Forecast.com widget for your website

The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Castlerock surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.

View detailed surf forecast for Castlerock at:
surf-forecast.com

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