Waimanu Bay surfForecast / HAW – Big Island / USA

information circle12 Day Weather and Surf, issued 7 pm Monday 30 Jun 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
26.1° C
(Which is normal for this time of year)


Best Forecast Surf Conditions for Waimanu Bay this week:

The most powerful waves expected at Waimanu Bay in the next 12 days are 2.1m 8s and forecast to arrive on Tuesday (Jul 08) at 2AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 4s period and expected on Tuesday (Jul 01) at 8AM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)--
Best Surf--
Most Powerful 2AM (Tue 8th Jul)7ft (2.1m) 8s

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

Updates in  hr  min  s Forecast update imminent
Tuesday
01
Wednesday
02
Thursday
03
Friday
04
Saturday
05
Sunday
06
Monday
07
Tuesday
08
Wednesday
09
Thursday
10
Friday
11
Sat
12
NightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPM
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
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Wave Height (m) & direction (?)
0.9
ENE
1.1
ENE
1.2
E
0.8
ENE
1
ENE
1.1
ENE
1.2
E
1.3
ENE
1.3
E
1.2
E
1.4
E
1.4
ENE
1.2
ENE
1.3
ENE
1.7
ENE
1.7
ENE
1.8
E
2.2
ENE
1.6
ENE
1.9
ENE
1.9
ENE
2.1
ENE
1.9
ENE
1.8
ENE
1.6
ENE
1.6
ENE
1.5
ENE
1.3
ENE
1.4
ENE
1.4
ENE
1.3
ENE
1.6
ENE
1.7
ENE
1.1
E
1.1
E
1.5
ENE
Period(s) (?)888777766776777776778888888777788888
Wave
Graph
(?)Metric surfscale
Energy (?)13018119287114125147160151141210174160205295280329390306439486537457426334325291210202206200278309287261281
Wind
(km/h)
20
ESE
20
ENE
20
ENE
20
E
15
ENE
20
ENE
15
E
20
ENE
20
E
25
E
25
ENE
25
ENE
25
E
25
E
25
E
25
E
30
E
25
E
25
E
30
E
30
E
25
E
35
ENE
30
ENE
20
E
25
ENE
25
ENE
20
E
25
ENE
25
ENE
20
E
20
ENE
20
ENE
20
E
25
ENE
25
ENE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
crosscross-
on
cross-
on
crosscross-
on
cross-
on
crosscross-
on
cross-
on
crosscross-
on
cross-
on
crosscross-
on
cross-
on
crosscross-
on
cross-
on
crosscross-
on
cross-
on
crosscross-
on
cross-
on
crosscross-
on
cross-
on
cross-
on
cross-
on
cross-
on
crosscross-
on
cross-
on
crosscross-
on
cross-
on
High Tide
/ height (m)
7:47AM
0.49
7:05PM
0.71
9:40AM
0.54
7:31PM
0.63
11:17AM
0.62
8:00PM
0.57
12:12PM
0.70
8:54PM
0.51
12:51PM
0.77
10:23PM
0.47
1:25PM
0.84
11:37PM
0.45
1:58PM
0.89
12:32AM
0.45
2:31PM
0.93
1:16AM
0.46
3:03PM
0.97
1:56AM
0.47
3:35PM
0.99
2:35AM
0.48
4:06PM
0.99
3:17AM
0.49
4:37PM
0.98
Low Tide
/ height (m)
1:58AM
0.27
12:18PM
0.39
2:38AM
0.25
1:43PM
0.49
3:19AM
0.23
4:26PM
0.53
4:03AM
0.21
6:56PM
0.50
4:47AM
0.18
7:59PM
0.45
5:30AM
0.15
8:32PM
0.41
6:12AM
0.11
9:00PM
0.38
6:52AM
0.07
9:27PM
0.35
7:30AM
0.03
9:55PM
0.34
8:05AM
0.01
10:24PM
0.32
8:41AM
0.01
10:54PM
0.31
9:16AM
0.03
Tuesday
01
Wednesday
02
Thursday
03
Friday
04
Saturday
05
Sunday
06
Monday
07
Tuesday
08
Wednesday
09
Thursday
10
Friday
11
Sat
12
Sunrise-5:46--5:46--5:47--5:47--5:47--5:48--5:48--5:48--5:48--5:48--5:48--5:50-
Sunset--7:06--7:06--7:06--7:06--7:06--7:06--7:06--7:06--7:06--7:06--7:06--7:05
clearclearclearclearclearclearclearclearclearpart cloudpart cloudclearpart cloudclearclearclearclearclearclearclearclearclearclearpart cloudclearclearpart cloudrain showersclearclearclearclearclearclearclearclear
Rain (mm)
---------------------------1--------
Temp. °C252727252625242626252626242626242726242727242626242626242626242626242626
Feels °C (?)262526252625242626252424232424222424222424212222212324242425232426232525

Short Range Forecast: Mostly dry. Warm (max 27°C on Tue morning, min 23°C on Mon night). Wind will be generally light.

Days 3-6 Weather Summary Mostly dry. Warm (max 27°C on Sun morning, min 23°C on Thu night). Wind will be generally light.

Days 6-9 Weather Summary Mostly dry. Warm (max 27°C on Mon morning, min 23°C on Mon night). Mainly fresh winds.

Long Range Forecast: Some drizzle, heaviest during Wed night. Warm (max 26°C on Thu morning, min 23°C on Wed 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)
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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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