20 April 2026: Tsunami Alert Issued for NE Japan

A magnitude-7.4 earthquake off the coast of Sanriku has triggered a tsunami warning. latest updates

Mablethorpe surfForecast / Lincolnshire / UK

information circle48hr Weather and Surf, issued 6 am Monday 20 Apr 2026 BST
Forecast update in hr  min  s Forecast update imminent
Mablethorpe surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Mablethorpe sea temperature is
9.8° C
(Which is 2.3°C warmer than normal for this time of year)

How big are the waves at Mablethorpe today?

The current surf forecast for Mablethorpe at 11AM is: 0.6m 7s primary swell from a North direction and 0.5m 7s secondary swell from a North direction (forecast issued at 06:00am April 20). The wind direction is predicted to be cross-shore.

Time (BST) & DateWave HeightWave Period
Morning (20 Apr)2ft (0.6m)7s
Afternoon (20 Apr)1.5ft (0.5m)6s
Evening (20 Apr)2ft (0.6m)4s

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


Updates in  hr  min  s Forecast update imminent
Monday
20
Tuesday
21
Wednesday
22
Thu
23
4AM7AM10AM1PM4PM7PM10PM1AM4AM7AM10AM1PM4PM7PM10PM1AM4AM7AM10AM1PM4PM7PM10PM1AM
Rating
(10 max)
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Wave Height (m) & direction (?)
0.3
NNE
0.4
NNE
0.6
N
0.5
N
0.5
NNE
0.7
NNE
0.6
NE
0.7
ENE
0.9
NE
1.1
ENE
1.2
ENE
1.3
ENE
1.2
ENE
1.1
NE
1.1
NE
1.1
ENE
1
ENE
0.9
ENE
0.9
ENE
0.8
ENE
0.8
ENE
0.8
NE
0.8
NE
0.8
NE
Period(s) (?)677764444566666665555554
Wave
Graph
(?)Metric surfscale
Energy kJ (?)615332323111014296487111998583776346423228252524
Wind
(km/h)
5
NW
10
NW
15
N
20
NNE
20
NNE
20
NE
20
ENE
25
NE
25
ENE
30
ENE
30
ENE
30
ENE
30
ENE
25
ENE
25
ENE
25
ENE
20
ENE
20
ENE
20
ENE
20
ENE
20
ENE
20
NE
15
NNE
15
NE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
off
cross-
off
crosscross-
on
cross-
on
cross-
on
cross-
on
cross-
on
cross-
on
ononcross-
on
cross-
on
cross-
on
cross-
on
ononcross-
on
ononcross-
on
cross-
on
cross-
on
cross-
on
High Tide
/ height (m)
8:30AM
5.66
8:51PM
5.77
9:10AM
5.40
9:39PM
5.37
9:55AM
5.04
10:33PM
4.85
Low Tide
/ height (m)
2:50PM
0.13
3:15AM
0.34
3:33PM
0.34
3:58AM
0.82
4:21PM
0.68
Monday
20
Tuesday
21
Wednesday
22
Thu
23
Sunrise-5:48-------5:47-------5:45------
Sunset-----8:07-------8:08-------8:09--
clear
clear
clear
clear
clear
clear
clear
cloud
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
clear
Rain (mm)
------------------------
Temp. °C778988778788887777888655
Feels °C (?)433434212011121122222111
  • 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

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 Mablethorpe 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.


Nearest locationNearest
Nearest locationNearest
Nearest locationNearest