
Surf Forecasts:
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 Type | Time (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 ForecastLight 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 SummaryMostly 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 | |
Swell Height Map | ||||||||||||||||||||
Wave Height (m) Direction Period (s) | S 13 | SW 13 | S 12 | SSW 12 | SSW 12 | SSW 12 | SSW 11 | SW 15 | SSW 11 | SW 15 | SW 14 | SW 14 | SW 14 | SSW 14 | SSW 16 | SW 20 | SW 19 | SW 18 | SSW 18 | SSW 18 |
Wave Graph | ||||||||||||||||||||
92 | 42 | 77 | 83 | 82 | 75 | 70 | 70 | 46 | 57 | 37 | 31 | 52 | 80 | 50 | 98 | 95 | 106 | 124 | 108 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | 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 | ||||||||
— | — | 6:00 | — | — | 6:00 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | 6:01 | — | — | |
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 |
Swell 1 Height (m) Direction Period (s) | S 13 | SSW 13 | S 12 | SSW 12 | SSW 12 | SSW 12 | SSW 11 | SSW 11 | SSW 11 | SSW 11 | SSW 10 | SSW 10 | SSW 10 | SSW 14 | S 10 | S 10 | SW 13 | S 14 | SSW 18 | SSW 13 |
92 | 34 | 77 | 83 | 82 | 75 | 70 | 70 | 46 | 45 | 37 | 19 | 19 | 80 | 19 | 34 | 46 | 106 | 124 | 99 | |
Swell 2 Height (m) Direction Period (s) | SW 13 | SW 13 | W 11 | W 11 | W 12 | SSW 18 | S 13 | SW 15 | S 12 | S 12 | S 12 | SW 14 | SW 14 | S 11 | SW 14 | SW 20 | SW 19 | SW 18 | SW 13 | SW 17 |
26 | 42 | 22 | 23 | 25 | 31 | 31 | 57 | 26 | 26 | 25 | 31 | 52 | 20 | 29 | 98 | 95 | 83 | 43 | 77 | |
Swell 3 Height (m) Direction Period (s) | W 12 | W 12 | SW 13 | SSW 13 | SSW 17 | W 11 | SW 16 | S 13 | W 13 | SW 15 | SW 14 | W 12 | W 12 | W 12 | SSW 16 | SSW 16 | SSW 15 | S 10 | SSW 14 | SSW 18 |
27 | 25 | 26 | 16 | 28 | 9 | 41 | 31 | 29 | 57 | 33 | 26 | 27 | 11 | 50 | 50 | 42 | 17 | 37 | 108 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | NW 2 | SW 9 | — | — | — |
— | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 22 | — | — | — | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 100 | 0 | 100 | 81 | 71 | 71 | 97 | 19 | 100 | 81 | 0 | 100 | 100 | 95 | 100 | 100 | 96 | 81 | 0 | 0 |
Best forecast wave conditions in Big Island | ||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||
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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.











