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Surf Forecasts:

Waimanu Bay surfForecast / HAW – Big Island / USA

information circle48hr Weather and Surf, issued 1 am Saturday 20 Dec 2025 HST
Forecast update in hr  min  s Forecast update imminent
Waimanu Bay surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Waimanu Bay sea temperature is
25.8° C
 (Which is slightly warmer than usual)

How big are the waves at Waimanu Bay today?

The current surf forecast for Waimanu Bay at 8AM is: 1.5m 11s primary swell from a North direction and 0.8m 8s secondary swell from a East direction (forecast issued at 01:00am December 20). The wind direction is predicted to be glassy and the swell rating is 3.

Time (HST) & DateWave HeightWave Period
Morning (20 Dec)5ft (1.5m)11s
Afternoon (20 Dec)4.5ft (1.4m)11s
Evening (20 Dec)4.5ft (1.4m)13s

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

Updates in  hr  min  s Forecast update imminent 
12 DaysHourly
Print Table
Saturday
20
Sunday
21
Monday
22
11 PM2 AM5 AM8 AM11 AM2 PM5 PM8 PM11 PM2 AM5 AM8 AM11 AM2 PM5 PM8 PM11 PM2 AM5 AM8 AM11 AM2 PM5 PM8 PM
Rating
(10 max)
3
3
3
3
2
3
1
1
2
2
1
1
0
0
1
0
0
0
0
0
0
0
0
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
1.6
NNW
1.5
NNW
1.4
NNW
1.5
N
1.5
N
1.5
N
1.3
N
1.2
N
1.7
N
1.7
N
1.6
N
1.6
N
1.5
N
1.4
N
1.4
N
1.3
N
1.3
N
1.2
N
1.2
N
1.2
N
1.3
N
1.4
N
1.2
N
1.1
N
Period(s) (?)111111111111111313131212121212111111111111111111
Wave
Graph
(?)Metric surfscale
Energy kJ (?)593512495565576565410503961903726690596511511426418350344342396466329272
Wind
(km/h)
5
SW
5
WSW
5
WSW
0
E
5
NNE
5
NE
10
E
20
E
20
E
20
E
20
E
20
E
20
E
20
ENE
25
E
25
E
25
E
25
E
25
E
25
E
25
E
20
E
20
E
25
E
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
glasscross-
off		glassglassonglasscross-
on		crosscrosscrosscrosscrosscross-
on		cross-
on		crosscross-
on		crosscrosscrosscrosscross-
on		cross-
on		cross-
on		cross-
on
High Tide
/ height (m)
3:39AM
0.97
2:32PM
0.47
4:11AM
0.97
3:05PM
0.47
4:42AM
0.96
3:42PM
0.46
Low Tide
/ height (m)
8:08PM
0.03
10:31AM
0.33
8:40PM
0.02
11:04AM
0.33
9:11PM
0.03
11:38AM
0.33
Saturday
20
Sunday
21
Monday
22
Sunrise---6:52-------6:52-------6:52----
Sunset------5:46-------5:47-------5:47-
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
clear
clear
part cloud
clear
clear
clear
clear
clear
clear
clear
clear
clear
part cloud
rain showers
Rain (mm)
-----------------------1
Temp. °C252424252626252424242324262525242424242426262423
Feels °C (?)282727292930272524242223262424232323222225262422
  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our Waimanu Bay 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 Waimanu Bay at:
surf-forecast.com

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