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Surf Forecasts:

Shacks surfForecast / HAW – Big Island / USA

information circle12 Day Weather and Surf, issued 7 pm Friday 22 Aug 2025 HST
Forecast update in hr  min  s Forecast update imminent
Shacks surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.
Today's Shacks sea temperature is
26.6° C
 (Which is normal for this time of year)

Best Forecast Surf Conditions for Shacks this week:

The surf forecast for Shacks over the next 12 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Aug 26) at 5AM. The primary swell is predicted to be 1.6m and 8s period with a secondary swell of 0.3m and 10s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Shacks in the next 12 days are 1.7m 8s and forecast to arrive on Sunday (Aug 24) at 2AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 10s period and expected on Tuesday (Aug 26) at 8AM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+) 5AM (Tue 26th Aug)5ft (1.6m) 8s
Best Surf 5AM (Tue 26th Aug)5ft (1.6m) 8s
Most Powerful 2AM (Sun 24th Aug)5.5ft (1.7m) 8s

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

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

Short Range Forecast Light rain (total 2mm), mostly falling on Sat morning. Warm (max 26°C on Sun morning, min 24°C on Sat night). Wind will be generally light.

Days 3-6 Weather Summary Light rain (total 3mm), mostly falling on Tue night. Warm (max 26°C on Tue morning, min 24°C on Mon night). Wind will be generally light.

Saturday
23
Sunday
24
Monday
25
Tuesday
26
Wednesday
27
Thursday
28
Fri
29
NightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPMNightAMPM
Rating
(10 max)
0
0
0
1
0
0
1
0
0
1
0
0
0
0
0
1
0
0
0
0
0
Swell
Height Map
See all maps
Wave Height (m) & direction (?)
1.5
E
1.7
E
1.7
E
1.7
E
1.6
E
1.6
ESE
1.6
ESE
1.6
ESE
1.6
ESE
1.6
ESE
1.6
ESE
1.6
ESE
1.6
ESE
1.4
ESE
1.2
E
1.1
E
0.6
S
0.7
S
1.3
ESE
0.7
S
1.2
ESE
Period(s) (?)888889888888887718189169
Wave
Graph
(?)Metric surfscale
Energy (?)559556569583494504378370391426390527396370366312507509497464492
Wind
(km/h)
15
ENE
25
E
20
E
10
ENE
20
E
15
E
5
E
20
ENE
15
ENE
5
NE
15
E
20
ENE
15
ENE
25
ENE
20
ENE
10
NE
20
ENE
20
ENE
15
ENE
15
ENE
15
ENE
Wind State (?)
onshore
cross-onshore
cross-shore
cross-offshore
offshore
glassy
cross-
on		oncross-
on		cross-
on		cross-
on		cross-
on		cross-
on		cross-
on		cross-
on		cross-
on		cross-
on		cross-
on		cross-
on		cross-
on		cross-
on		crosscross-
on		cross-
on		cross-
on		cross-
on		cross-
on
High Tide
/ height (m)
3:15AM
0.68
3:43PM
0.99
3:51AM
0.72
4:08PM
0.94
4:26AM
0.76
4:31PM
0.87
5:02AM
0.77
4:52PM
0.79
5:39AM
0.77
5:11PM
0.71
6:20AM
0.76
5:25PM
0.64
7:12AM
0.73
5:31PM
0.57
Low Tide
/ height (m)
9:46PM
0.18
9:04AM
0.08
10:09PM
0.16
9:41AM
0.12
10:31PM
0.15
10:17AM
0.18
10:53PM
0.15
10:53AM
0.26
11:14PM
0.15
11:31AM
0.33
11:36PM
0.17
12:14PM
0.41
12:00AM
0.19
1:13PM
0.48
Saturday
23
Sunday
24
Monday
25
Tuesday
26
Wednesday
27
Thursday
28
Fri
29
Sunrise-6:01--6:01--6:01--6:01--6:01--6:03--6:03-
Sunset--6:40--6:39--6:39--6:38--6:37--6:37--6:36
part cloud
rain showers
clear
part cloud
rain showers
clear
part cloud
part cloud
clear
part cloud
part cloud
part cloud
rain showers
part cloud
clear
part cloud
rain showers
clear
clear
clear
clear
Rain (mm)
-1--1-------2---1----
Temp. °C252525252626252626252626252626252626252626
Feels °C (?)252424252424262526262626252525252626252625
  • 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 Shacks (calm at Hawaiian Paradise Park wx 16 km from Shacks). 1.5m 8s swell from the E with a 0.8m 8s swell, also from the E and a 0.4m 13s groundswell, also from the S. 3 swells combining to make bigger set waves.

    1 hour 35 minutes ago Shacks
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<
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16 km away, 1 h 35 min ago

0 km/h
SE
0.0
26.6
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 Shacks 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 Shacks at:
surf-forecast.com

Information about the Shacks Surf forecast

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

Shacks is 38 km (24 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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