Kua Bay Surf Break

Lat Long: 19.81° N 156.01° W

Kua Bay Surf Forecast and Surf Report

Issued: 1 am 07 Sep 2026 (local time)

Forecast update in  hr  min

Today's Kua Bay sea temperature is
27.7°C
0.9° 

Kua Bay surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Kua Bay surf forecast from 7 Sep 2026:

  • Best quality surf: Monday 7 Sep, 11PM (local time) - 7ft (2.1m), 14s period, WSW swell with cross-offshore winds.
  • Most powerful swell: Monday 7 Sep, 11PM (local time) - 7ft (2.1m), 14s period, WSW swell with 1,710 kJ wave energy.
  • Next surfable swell (1★+): Monday 7 Sep, 8AM (local time) - 3.5ft (1.0m), 12s period with SW swell.

Best Forecast Surf Conditions for Kua Bay this week:

The surf forecast for Kua Bay over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Sep 07) at 8AM. The primary swell is predicted to be 1.0m and 12s period. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Kua Bay in the next 16 days are 2.1m 14s and forecast to arrive on Monday (Sep 07) at 11PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.9m 12s period and expected on Monday (Sep 07) at 8PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+) 8AM (Mon 7th Sep)3.5ft (1.0m) 12s
Best Surf11PM (Mon 7th Sep)7ft (2.1m) 14s
Most Powerful11PM (Mon 7th Sep)7ft (2.1m) 14s

Table - best surf conditions forecast for Kua Bay over the next 16 days.


The Lowdown

Alright folks, Rusty here. Let's have a look at what Kua Bay has on offer over the next couple of weeks.

Right off the bat, the outlook is a bit of a tough one. We’ve got a long stretch of very small or non-existent surf ahead. Things start off with a pulse on Monday the 7th and Tuesday the 8th, but after that, we’re looking at a serious flat spell that runs all the way from Wednesday the 9th through to the 21st of September. During that stretch, wave heights are barely registering, with energy numbers staying below 75 (weak). It’s going to be a quiet period for the Bay.

The only real chance for a surf comes right at the beginning. Monday morning the 7th sees a 3ft SW groundswell with a long 11-second period and light offshore NW breeze. Conditions will be clean, but the energy is a modest 205 (moderate). The water’s sitting at 82°, which is about average for this time of year. Monday afternoon the swell picks up a bit to 4ft, and the period stretches out to a very long 15 seconds, bumping the energy up to 695 (moderate-strong). However, the wind shifts cross-onshore from the West, so it will get a little lumpy. It's still the best offering of the window.

Tuesday the 8th is the real highlight, mate. Morning brings a 6ft swell from the WSW with a clean, cross-off wind from the SSW blowing at 19 mph. The energy is strong at 559 (moderate-strong). That 6ft is starting to get a bit meaty, and with that wind, Kua Bay should be offering some proper, lined-up waves. The afternoon stays clean but the swell drops slightly to 5ft. The optimum direction for Kua Bay is WNW, and this WSW swell is reasonably close, which is a plus. Because the swell is over 5ft, it might be pushing it for total beginners, but for intermediates and above, Tuesday morning is the standout of the entire forecast. Crowds are only "sometimes" an issue here, so you might get a few out, but it’s worth the paddle.

After that, it’s a flat spell right through until the 22nd. There’s a tiny pulse on the 20th and 21st with 1ft and 2ft swells, but the energy is still weak and the quality is poor. Honestly, after the 8th, you might want to save your energy.

So, in short: Tuesday the 8th is your day. Monday the 7th afternoon is a decent fallback. The rest of the 16 days? A solid blank run for the area. Forecasts can change, but as it stands, it’s a long dry spell.

Rusty.

Short Range Forecast

Light rain (total 9mm), mostly falling on Wed night. Warm (max 29°C on Mon afternoon, min 26°C on Wed night). Winds decreasing (fresh winds from the SSW on Tue morning, calm by Tue night).

Days 4-6 Weather Summary

Moderate rain (total 12mm), heaviest on Thu morning. Warm (max 28°C on Thu morning, min 25°C on Thu night). Wind will be generally light.

Monday
7
Tuesday
8
Wednesday
9
Thursday
10
Friday
11
Saturday
12
Sunday
13
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
1
2
2
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.9
SW
11
1.3
SW
15
2.2
WSW
13
1.7
WSW
10
1.6
W
10
0.9
WNW
9
0.6
W
7
0.4
WNW
7
0.8
NE
7
0.3
SW
16
0.3
SW
18
0.3
SW
16
0.4
SW
10
0.4
SW
10
0.4
SW
15
0.4
SW
15
0.3
SW
14
0.3
SW
14
0.7
NNE
8
0.2
W
11
0.5
NE
8
Wave Graph
Metric surfscale
Energy kJ
205
695
1672
559
479
135
39
15
0
42
50
42
25
24
0
0
29
29
0
11
0
Wind (km/h)
5
NW
10
W
25
S
30
SSW
20
SSW
0
S
10
W
10
WSW
10
WSW
5
W
5
S
10
S
10
W
10
W
10
SW
15
SW
10
SW
5
SW
5
WNW
5
SW
5
N
Wind State
on
cross-on
cross-off
cross-off
cross-off
glassy
cross-on
cross-on
cross
glassy
cross-off
cross-off
cross-on
cross-on
cross
cross-off
cross
glassy
on
glassy
glassy
High Tide
1:36PM0.81m
1:57AM0.40m
2:18PM0.82m
2:40AM0.48m
2:55PM0.80m
3:19AM0.56m
3:28PM0.76m
3:57AM0.62m
4:00PM0.70m
4:35AM0.67m
4:29PM0.63m
5:12AM0.70m
4:56PM0.55m
Low Tide
8:41PM0.12m
7:21AM0.09m
9:06PM0.09m
8:14AM0.08m
9:31PM0.07m
9:04AM0.09m
9:55PM0.06m
9:51AM0.11m
10:19PM0.05m
10:36AM0.14m
10:41PM0.06m
11:23AM0.19m
11:04PM0.07m
part cloud
part cloud
clear
clear
clear
thunderstorm
part cloud
thunderstorm
thunderstorm
rain showers
rain showers
rain showers
rain showers
rain showers
rain showers
part cloud
part cloud
rain showers
clear
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:09
6:09
6:09
6:09
6:09
6:09
6:09
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
6:34
6:32
6:31
6:30
6:30
6:29
6:28
 mm
1
2
6
1
1
2
1
2
4
1
Temp °C
28
29
28
29
29
28
28
28
27
28
28
27
27
26
25
26
26
26
27
27
26
Feels °C
32
32
32
29
29
32
31
31
31
32
31
32
30
28
28
28
28
30
30
30
29
  • 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 Kua Bay Surf forecast

The above surf forecast table for Kua Bay provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Kua Bay can be found by selecting the local surf guide option on the grey menu. Our Kua 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 (Kua 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 Kua 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.

Kua Bay is 97 km (60 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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