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Surf Forecasts:

Kapoho Bay surfForecast / HAW – Big Island / USA

information circle12 Day Weather and Surf, issued 7 am Tuesday 16 Sep 2025 HST
Forecast update in hr  min  s Forecast update imminent
Kapoho Bay surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Kapoho Bay sea temperature is
26.8° C
 (Which is normal for this time of year)

Best Forecast Surf Conditions for Kapoho Bay this week:

The surf forecast for Kapoho Bay over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Sep 18) at 8AM. The primary swell is predicted to be 1.5m and 8s period. The wind is predicted to be cross-offshore as the swell arrives.

The most powerful waves expected at Kapoho Bay in the next 12 days are 1.9m 8s and forecast to arrive on Sunday (Sep 21) at 5PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.2m 8s period and expected on Saturday (Sep 20) at 5PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+) 8AM (Thu 18th Sep)5ft (1.5m) 8s
Best Surf 8AM (Thu 18th Sep)5ft (1.5m) 8s
Most Powerful 5PM (Sun 21st Sep)6ft (1.9m) 8s

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

Updates in  hr  min  s Forecast update imminent 
12 DaysHourly
Print Table

Short Range Forecast Light rain (total 4mm), mostly falling on Tue night. Warm (max 26°C on Tue morning, min 24°C on Tue night). Wind will be generally light.

Days 3-6 Weather Summary Moderate rain (total 15mm), heaviest on Sat morning. Warm (max 26°C on Fri morning, min 24°C on Sat night). Wind will be generally light.

Tuesday
16
Wednesday
17
Thursday
18
Friday
19
Saturday
20
Sunday
21
Monday
22
AMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNight
Rating
(10 max)
0
0
0
0
0
0
1
0
0
0
0
1
0
0
0
0
0
1
0
0
1
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
1.3
ESE
1.5
E
1.4
E
1.5
ESE
1.5
ESE
1.6
ESE
1.4
ESE
1.4
ESE
1.2
ESE
1.2
E
0.5
S
0.7
SSW
0.8
SSW
0.7
SSW
0.7
SSW
1.1
NE
1.9
ENE
1.2
NE
1.1
NE
1.1
NE
1.2
NE
Period(s) (?)88888887771816161514888888
Wave
Graph
(?)Metric surfscale
Energy kJ (?)240301251253240273226220164155160273337228218171438201169165182
Wind
(km/h)
20
ENE
20
NE
15
ENE
15
ENE
20
ENE
10
ENE
15
NE
20
NE
15
NNE
20
NNE
25
NNE
15
NNE
20
E
15
ENE
10
ENE
20
NE
20
ENE
10
ENE
15
ENE
20
NE
10
ENE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
on		crosscross-
on		cross-
on		cross-
on		cross-
on		crosscross-
on		crosscrosscrosscrosscross-
on		cross-
on		cross-
on		cross-
on		cross-
on		cross-
on		cross-
on		cross-
on		cross-
on
High Tide
/ height (m)
12:21PM
0.90
12:31AM
0.49
1:06PM
0.93
1:16AM
0.57
1:41PM
0.95
1:53AM
0.66
2:11PM
0.94
2:27AM
0.74
2:38PM
0.91
2:58AM
0.80
3:03PM
0.87
3:29AM
0.85
3:26PM
0.82
4:00AM
0.88
Low Tide
/ height (m)
7:34PM
0.28
5:58AM
0.20
7:56PM
0.23
6:54AM
0.17
8:17PM
0.19
7:38AM
0.15
8:38PM
0.16
8:18AM
0.15
8:58PM
0.13
8:55AM
0.16
9:17PM
0.11
9:31AM
0.19
9:37PM
0.10
Tuesday
16
Wednesday
17
Thursday
18
Friday
19
Saturday
20
Sunday
21
Monday
22
Sunrise6:05--6:07--6:07--6:07--6:07--6:07--6:07--
Sunset-6:21--6:20--6:19--6:17--6:16--6:15--6:15-
part cloud
clear
rain showers
clear
clear
clear
cloud
thunderstorm
thunderstorm
clear
clear
clear
thunderstorm
rain showers
rain showers
rain showers
rain showers
rain showers
clear
clear
rain showers
Rain (mm)
--1----12---611223--6
Temp. °C262525252525252525262625252626252625262625
Feels °C (?)262425262425262626262626262727252727272726
  • 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

Eyeball surf reportRecent Eyeball Surf Reports for HAW - Big Island

  1. weather stationWind Update Continuing clean conditions at Kapoho Bay (calm at Hawaiian Paradise Park wx 16 km from Kapoho Bay). 1.4m 8s swell from the E with a 0.6m 8s swell from the NE. 2 swells combining to make bigger set waves.

    42 minutes ago Kapoho Bay
Expand
<
>
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16 km away, 42 min ago

0 km/h
W
0.0
26.8
Air / Water (°C)
Please reload the page to see if there are any updates.

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 Kapoho 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 Kapoho Bay at:
surf-forecast.com

Information about the Kapoho Bay Surf forecast

The above surf forecast table for Kapoho Bay provides essential information for determining whether the surfing conditions will be good over the next 12 days. A general guide to surfing at Kapoho Bay can be found by selecting the local surf guide option on the grey menu. Our Kapoho 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 (Kapoho 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 Kapoho 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.

Kapoho Bay is 37 km (23 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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