Waiaha Rivermouth / Honls Surf Break

Lat Long: 19.63° N 155.99° W

Waiaha Rivermouth / Honls Surf Forecast and Surf Report

Issued: 1 pm 02 Aug 2026 (local time)

Forecast update in  hr  min

Today's Waiaha Rivermouth / Honls sea temperature is
27.3° C
1.0° 

Waiaha Rivermouth / Honls surf forecast is for near shore open water. Breaking waves will often be smaller at less exposed spots.


Waiaha Rivermouth / Honls surf forecast from 3 Aug 2026:

  • Best quality surf: Saturday 8 Aug, 5PM (local time) - 1.5ft (0.4m), 18s period, SSW swell with glassy winds.
  • Most powerful swell: Sunday 9 Aug, 8PM (local time) - 2ft (0.6m), 16s period, SSW swell with 201 kJ wave energy.
  • Next surfable swell (1★+): Sunday 2 Aug, 11PM (local time) - 1.5ft (0.5m), 13s period with S swell.

Best Forecast Surf Conditions for Waiaha Rivermouth / Honls this week:

The surf forecast for Waiaha Rivermouth / Honls over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Aug 02) at 11PM. The primary swell is predicted to be 0.5m and 13s period with a secondary swell of 0.4m and 13s. The wind is predicted to be glassy as the swell arrives.

The most powerful waves expected at Waiaha Rivermouth / Honls in the next 16 days are 0.6m 16s and forecast to arrive on Sunday (Aug 09) at 8PM. Winds are predicted to be glassy at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 3s period and expected on Sunday (Aug 09) at 5PM.

Wave TypeTime (HST) & Date Wave Height & Period
Next good surf (1 star+)11PM (Sun 2nd Aug)1.5ft (0.5m) 13s
Best Surf 5PM (Sat 8th Aug)1.5ft (0.4m) 18s
Most Powerful 8PM (Sun 9th Aug)2ft (0.6m) 16s

Table - best surf conditions forecast for Waiaha Rivermouth / Honls over the next 16 days.


The Lowdown

Alright folks, Rusty here. Let’s break down what’s happening at Waiaha Rivermouth / Honls over the next couple of weeks.

First up, the start of the period is a total dud. We’ve got tiny, weak swell from the south, mostly under 2ft, with messy cross and cross-on winds. The wave energy is low (145), and it’s just poor surf day after day. Water temp is 81°, which is normal for this time of year, so nothing wild there.

The first real sign of life comes on Saturday, August 8th. The swell stays small, but we get a glassy window on Saturday afternoon with a 1ft SSW swell, period 18 seconds, at 204 energy. That’s a long-period groundswell, and for a reef setup like Honls, it’ll hold shape nicely, even if it’s small.

The best day of the whole run is Wednesday, August 12th. The combined energy hits 1129, with a 4ft S swell, period 18 seconds. That’s a proper groundswell, and with light cross-on winds, it’s going to be clean and powerful. This is the one to circle – a classic reef day for advanced surfers. It’s too big for beginners at over 3ft, but for the experienced crew, it’s going to be pumping. The optimum swell direction from the guidance is SSW, and we’re getting a S swell, which is a damn good match.

Later in the second week, on Sunday, August 16th, and Monday, August 17th, we get another dose of glassy conditions. A 3ft W swell, period 14 seconds, with the energy moderate (333 and 250). The wind goes dead calm or glassy, which means mirror-like faces. The swell direction is shifting west, but for a reef, it’ll still offer fun, clean rides. Crowds are listed as “sometimes,” so you might have a few guys out, but it won’t be packed.

Bottom line: skip the first week. The real action is on August 12th for the biggest, most powerful waves, and the glassy days on the 16th and 17th for clean, smaller surf. The near-term forecast is solid, and the long-range stuff is looking promising.

This is Rusty, signing off.

Short Range Forecast

Light rain (total 2mm), mostly falling on Mon night. Warm (max 27°C on Sun afternoon, min 25°C on Sun night). Wind will be generally light.

Days 5-7 Weather Summary

Mostly dry. Warm (max 27°C on Wed afternoon, min 25°C on Wed night). Wind will be generally light.

Sun
2
Monday
3
Tuesday
4
Wednesday
5
Thursday
6
Friday
7
Saturday
8
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
AM
PM
Night
Rating
(10 max)
0
1
0
0
0
0
0
0
0
0
1
0
0
0
0
0
1
1
2
2
Swell
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Height Map
Wave
Height (m)
Direction
Period (s)
0.5
S
13
0.4
SW
13
0.5
S
12
0.5
SSW
12
0.5
SSW
12
0.5
SSW
12
0.5
SSW
11
0.4
SW
15
0.4
SSW
11
0.4
SW
15
0.3
SW
14
0.3
SW
14
0.4
SW
14
0.4
SSW
14
0.3
SSW
16
0.4
SW
20
0.4
SW
19
0.4
SW
18
0.4
SSW
18
0.4
SSW
18
Wave Graph
Metric surfscale
Energy kJ
92
42
77
83
82
75
70
70
46
57
37
31
52
80
50
98
95
106
124
108
Wind (km/h)
10
WSW
5
S
15
WNW
5
NW
5
WSW
10
WNW
5
WNW
5
SSW
10
WNW
10
WSW
10
NNW
10
SW
10
WSW
10
NW
10
WSW
10
W
5
WNW
10
W
5
WSW
5
SSW
Wind State
cross-on
glassy
cross-on
cross
cross-on
cross
cross-on
on
cross-on
on
cross-off
on
cross-on
cross
on
cross-on
cross
cross-on
glassy
glassy
High Tide
6:05PM0.54m
7:25AM0.45m
6:38PM0.46m
8:31AM0.50m
7:17PM0.38m
9:44AM0.56m
8:09PM0.30m
10:56AM0.63m
9:33PM0.24m
12:00PM0.69m
11:15PM0.21m
12:56PM0.75m
00:37AM0.22m
Low Tide
00:55AM0.04m
1:00PM0.22m
1:27AM0.03m
2:37PM0.26m
2:05AM0.03m
4:46PM0.26m
2:55AM0.02m
6:41PM0.22m
3:54AM0.02m
7:48PM0.16m
5:01AM0.01m
8:33PM0.11m
clear
part cloud
part cloud
clear
rain showers
part cloud
part cloud
part cloud
clear
part cloud
part cloud
part cloud
part cloud
part cloud
clear
clear
part cloud
part cloud
part cloud
clear
<span class="translation_missing" title="translation missing: en.weather_tables.sunrise">Sunrise</span>
6:00
6:00
6:01
6:01
6:01
6:01
<span class="translation_missing" title="translation missing: en.weather_tables.sunset">Sunset</span>
7:00
6:59
6:58
6:58
6:57
6:57
6:55
 mm
2
Temp °C
27
26
27
26
26
27
27
26
27
27
26
27
27
26
27
27
26
27
28
27
Feels °C
30
29
29
28
30
30
29
29
29
30
29
30
29
29
29
30
29
29
31
30
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  • Live Wind Speed (km/h)
  • Surf Rating (10 Max)
  • Ocean Swells (m)
  • Wind Speed (km/h)
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Information about the Waiaha Rivermouth / Honls Surf forecast

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

Waiaha Rivermouth / Honls is 95 km (59 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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