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Surf Forecasts:

Castlerock surf break

Castlerock surfForecast / Londonderry / Ireland

information circle48hr Weather and Surf, issued 5 am Friday 21 Nov 2025 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
12.2° C
 (Which is 1.2°C warmer than normal for this time of year)

How big are the waves at Castlerock today?

The current surf forecast for Castlerock at 7AM is: 0.6m 6s primary swell from a North-northwest direction and 0.2m 14s secondary swell from a West-northwest direction (forecast issued at 05:00am November 21). The wind direction is predicted to be cross-offshore.

Time (GMT) & DateWave HeightWave Period
Morning (21 Nov)1.5ft (0.5m)6s
Afternoon (21 Nov)1.5ft (0.4m)14s
Evening (21 Nov)1.5ft (0.4m)13s

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

Updates in  hr  min  s Forecast update imminent 
12 DaysHourly
Print Table
Friday
21
Saturday
22
Sunday
23
Mon
24
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)
1
0
0
1
0
0
0
0
0
0
0
1
2
1
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
0.8
NNW
0.6
NNW
0.5
NNW
0.4
NW
0.4
NW
0.4
NW
0.4
NW
0.7
WNW
0.6
WNW
0.4
NW
0.7
NW
0.8
WNW
0.9
NW
0.9
NW
0.9
NW
0.8
NW
0.7
NW
0.7
NW
0.7
NW
0.8
WNW
0.9
WNW
0.8
WNW
0.8
WNW
1.4
N
Period(s) (?)66614141413101113101312121111111112121212116
Wave
Graph
(?)Metric surfscale
Energy kJ (?)4626194851494486754498212223195182145121126140193226174166139
Wind
(km/h)
15
SW
15
SW
15
SSW
20
S
25
S
30
S
25
SSW
20
SW
15
WSW
15
SW
15
SW
15
SW
10
SW
15
S
20
SSE
30
SSE
25
SW
30
SW
30
SW
35
WSW
30
WSW
35
N
25
N
30
NNE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off		cross-
off		offoffoffoffoffcross-
off		cross-
off		cross-
off		cross-
off		cross-
off		cross-
off		offcross-
off		offcross-
off		cross-
off		cross-
off		cross-
off		cross-
off		ononon
High Tide
/ height (m)
6:10AM
1.70
6:22PM
1.56
6:42AM
1.69
6:52PM
1.51
7:16AM
1.65
7:23PM
1.45
Low Tide
/ height (m)
12:09AM
0.23
12:35PM
0.28
12:37AM
0.25
1:09PM
0.33
1:07AM
0.29
1:44PM
0.41
Friday
21
Saturday
22
Sunday
23
Mon
24
Sunrise--8:10-------8:11-------8:14-----
Sunset----4:14-------4:13-------4:10---
clear
part cloud
cloud
cloud
cloud
light rain
light rain
part cloud
clear
clear
cloud
rain showers
part cloud
part cloud
cloud
light rain
rain showers
rain showers
light rain
rain showers
rain showers
light rain
light rain
rain showers
Rain (mm)
-----43----1---141431241
Temp. °C454454566667866788889877
Feels °C (?)-10-1-2-2-3-211223521021102110
  • 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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