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Surf Forecasts

Waimanu Bay surfForecast / HAW – Big Island / USA

information circle12 Day Weather and Surf, issued 7 pm Tuesday 25 Mar 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
24.9° C
 (Which is slightly warmer than usual)

Best Forecast Surf Conditions for Waimanu Bay this week:

The surf forecast for Waimanu Bay over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Mar 25) at 11PM. The primary swell is predicted to be 1.0m and 12s period with a secondary swell of 1.0m and 8s. The wind is predicted to be cross-shore as the swell arrives.

The most powerful waves expected at Waimanu Bay in the next 12 days are 1.1m 13s and forecast to arrive on Saturday (Mar 29) at 2PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 4s period and expected on Monday (Mar 31) at 11AM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)11PM (Tue 25th Mar)3.5ft (1.0m) 12s
Best Surf 5AM (Wed 26th Mar)3ft (0.9m) 12s
Most Powerful 2PM (Sat 29th Mar)3.5ft (1.1m) 13s

Table - best surf conditions forecast for Waimanu Bay over the next 12 days.

Hourly12 Days
Big Island Surf
Print Surf Table
Updates in  hr  min  s Forecast update imminent 
Wednesday
26
Thursday
27
Friday
28
Saturday
29
Sunday
30
Monday
31
Tuesday
01
Wednesday
02
Thursday
03
Friday
04
Saturday
05
Sun
06
NightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPM
Rating
(10 max)
1
0
0
0
0
0
0
1
0
0
0
1
0
0
0
0
0
1
1
0
1
0
0
0
0
0
0
1
0
0
0
0
0
1
0
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
1
NNW
0.9
NNW
0.5
NW
1.2
E
1.1
E
1.4
E
0.8
N
0.8
N
0.8
N
0.9
N
1
N
0.8
NNE
0.8
NNE
0.9
NNE
0.8
NNE
0.7
NNE
0.7
NNE
0.8
NNE
0.8
NNE
0.7
ESE
1.1
ESE
0.9
N
0.9
N
0.9
N
0.9
N
1.1
N
1.6
N
1.8
N
1.9
NNE
1.9
NNE
1.4
NNE
1.5
NNE
2
NE
1.8
ENE
1.9
E
1.8
E
Period(s) (?)1211115551010101112131212111110109891211111010101099988777
Wave
Graph
(?)Metric surfscale
Energy (?)29918659785810413613812518227620116922415612110212810672186217192188174250502602592573304286494365361312
Wind
(km/h)
10
ESE
10
E
15
E
15
ESE
20
ENE
20
E
10
E
5
N
10
E
15
ESE
15
ENE
15
E
15
E
15
ENE
15
E
15
E
10
ENE
5
NNE
0
WNW
5
N
5
ENE
15
E
20
ENE
20
E
20
E
25
E
25
ENE
20
ESE
20
E
20
E
20
E
15
E
20
E
15
ESE
15
E
15
E
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
crosscross-
on		cross-
on		crosscross-
on		cross-
on		crossglasscrosscrosscross-
on		crosscrosscross-
on		cross-
on		crosscross-
on		glassglasscross-
on		glasscrosscross-
on		cross-
on		crosscross-
on		cross-
on		crosscross-
on		cross-
on		crosscross-
on		cross-
on		crosscross-
on		cross-
on
High Tide
/ height (m)
1:06AM
0.89
1:16PM
0.61
1:38AM
0.89
2:00PM
0.71
2:10AM
0.86
2:43PM
0.81
2:42AM
0.81
3:27PM
0.88
3:13AM
0.74
4:13PM
0.92
3:42AM
0.66
5:01PM
0.93
4:11AM
0.58
5:54PM
0.91
4:36AM
0.51
6:56PM
0.86
4:51AM
0.44
8:15PM
0.82
9:45PM
0.79
9:17AM
0.36
11:00PM
0.79
11:29AM
0.42
Low Tide
/ height (m)
7:43AM
0.22
7:02PM
0.16
8:06AM
0.16
7:52PM
0.16
8:31AM
0.11
8:42PM
0.18
8:58AM
0.07
9:33PM
0.22
9:27AM
0.04
10:26PM
0.28
9:57AM
0.04
11:25PM
0.34
10:30AM
0.06
12:37AM
0.40
11:06AM
0.10
2:29AM
0.43
11:49AM
0.15
12:51PM
0.22
6:39AM
0.35
2:39PM
0.27
6:43AM
0.31
4:27PM
0.28
Wednesday
26
Thursday
27
Friday
28
Saturday
29
Sunday
30
Monday
31
Tuesday
01
Wednesday
02
Thursday
03
Friday
04
Saturday
05
Sun
06
Sunrise-6:20--6:20--6:18--6:18--6:18--6:16--6:16--6:15--6:13--6:13--6:11--6:11-
Sunset--6:35--6:35--6:35--6:36--6:36--6:36--6:36--6:37--6:37--6:37--6:37--6:37
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Rain (mm)
------------------------------------
Temp. °C232524242525232525242424232424232424242525242524232625242525242525242525
Feels °C (?)242625252525232828262525242425232527272727262424222424222525242625252525

Short Range Forecast: Mostly dry. Warm (max 25°C on Wed morning, min 23°C on Tue night). Wind will be generally light.

Days 3-6 Weather Summary Mostly dry. Warm (max 24°C on Fri night, min 22°C on Sat night). Wind will be generally light.

Days 6-9 Weather Summary Mostly dry. Warm (max 26°C on Thu morning, min 22°C on Wed night). Wind will be generally light.

Long Range Forecast: Mostly dry. Warm (max 25°C on Fri morning, min 23°C on Thu night). Wind will be generally light.

  • Map Icons:
  • Break
  • Live Wave Height (m)
  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
<span class="translation_missing" title="translation missing: en.leaflet.map_placeholder_alt">Map Placeholder Alt</span>
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View detailed surf forecast for Waimanu Bay at:
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Information about the Waimanu Bay Surf forecast

The above surf forecast table for Waimanu Bay provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Waimanu Bay can be found by selecting the local surf guide option on the grey menu. Our Waimanu Bay surf forecast is unique since it includes wave energy (power) that defines the real feel of the surf rather than just the height or the period. If you surf the same spot (Waimanu Bay) regularly then make a mental note of the wave energy from the surf forecast table each time you go. Very soon you may start to choose your surf days based on the wave energy alone combined with our forecast of favourable offshore wind conditions. Our star ratings will help here and of course you will also find the usual wave height and period predictions on our surf forecasts as well as a full break down of the swell components under our advanced users option (to reveal that, click the little Einstein character under the tide times).

Further information to help with frequently asked questions about our surf forecast for Waimanu Bay may be found under the help tab on the top menu and also by moving your mouse over the question marks on the surf forecast table itself. Please always bear in mind that the forecast is for near-shore open water and local factors at each surf break influence the actual breaking wave height, such as the beach / reef profile, water depths offshore and shelter.

Waimanu Bay is 74 km (46 miles) from Hilo. If you plan a vacation in Big Island, look for hotels and other accommodation in Hilo. Hilo has rooms for a wide range of budgets as well as car hire and transport links.

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