
Surf Forecasts:
Waimanalo surf forecast from 2 Aug 2026:
- Most powerful swell: Sunday 2 Aug, 2AM (local time) - 8ft (2.5m), 8s period, ENE swell with 908 kJ wave energy.
Best Forecast Surf Conditions for Waimanalo this week:
The most powerful waves expected at Waimanalo in the next 16 days are 2.5m 8s and forecast to arrive on Sunday (Aug 02) at 2AM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.3m 12s period and expected on Thursday (Aug 06) at 5AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 2AM (Sun 2nd Aug) | 8ft (2.5m) 8s |
Table - best surf conditions forecast for Waimanalo over the next 16 days.
The Lowdown
Alright folks, Rusty here. Gotta be straight with you – the next couple of weeks for Waimanalo are looking like a real battle with the wind. We’ve got consistent swell, but the conditions are making it a tough go for a clean paddle.
The whole 16-day window is a bit of a write-off for quality surf. The dominant wind is a relentless onshore breeze from the ENE, which is just about the worst direction for this spot. The water is sitting at a warm 80°, which is pretty much average for this time of year, so no surprises there.
Looking at the start, Saturday the 1st of August kicks off with a chunky 8ft swell from the east, packing a massive 1100 units of energy, but that’s paired with a nasty 25 mph cross-onshore wind. It’s messy, choppy, and pretty much unsurfable. That same pattern holds through the weekend and into Monday with 7ft to 6ft of onshore slop. The energy stays high, around the 496 to 896 mark, but the wind just won’t let up.
By Tuesday the 4th, the swell drops a bit to 5ft, and the period stretches to 11 seconds, which would normally be a sign of some nice groundswell. But the wind is still on it, so it’s not going to clean up. The energy is still moderate at 584. The rest of the first week is more of the same: 4ft to 2ft of weak, wind-affected swell, with energy dropping to as low as 110. It’s a real frustrating stretch.
We hit a bit of a lull on the 6th, with the swell bottoming out at 2ft and only 81 units of energy. Then it starts to build again, but it’s all short-period windswell. Friday the 7th brings a 4ft swell with a pathetic 6-second period, and the wind is howling at 22 mph. It’s just not worth the paddle.
The second week doesn’t offer any relief. From the 8th to the 13th, we’re stuck with 5ft to 6ft of onshore slop, all with periods of 6 to 7 seconds. The wind is either onshore or cross-onshore, never letting the waves clean up. The energy is moderate, ranging from 169 to 359, but the quality is just poor.
The forecast wraps up with a building swell from the 14th to the 16th. Saturday the 15th sees a solid 8ft east swell with 849 units of energy, but again, the wind is a strong 22-25 mph cross-onshore. It’s a powerful, messy wall of whitewater. For a beginner-friendly spot like Waimanalo, anything over 5ft is already pushing it, and with these winds, it’s not just challenging – it’s dangerous for anyone but the most experienced. Honestly, this setup looks more interesting for the kite surfers than for paddle surfers.
So, there’s no standout session in this window. The wind is the enemy, and it’s not letting up. Keep the board in the car and wait for a day when that ENE wind backs off. Forecasts can change, but right now, we’re in a dry spell.
Rusty.
Short Range ForecastSome drizzle, heaviest during Mon night. Warm (max 25°C on Sat morning, min 24°C on Sun night). Winds decreasing (strong winds from the ENE on Sat morning, light winds from the ENE by Mon night). | Days 4-6 Weather SummarySome drizzle, heaviest during Tue night. Warm (max 26°C on Wed afternoon, min 24°C on Tue morning). Mainly fresh winds. | ||||||||||||||||||||
Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | Thursday 6 | Friday 7 | |||||||||||||||
AM | 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) | E 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 11 | ENE 11 | ENE 10 | ENE 10 | ENE 9 | ENE 9 | ENE 8 | ENE 8 | ENE 5 | ENE 6 | ENE 6 | E 7 |
Wave Graph | |||||||||||||||||||||
890 | 824 | 908 | 682 | 650 | 533 | 402 | 331 | 370 | 582 | 496 | 460 | 318 | 203 | 172 | 59 | 43 | 74 | 109 | 140 | 302 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | on | on | on | on | on | on | on | on | on | on | on | on | cross-on | cross-on | on | cross-on | on | on | cross-on |
High Tide | 4:44PM0.61m | 4:42AM0.37m | 4:58PM0.57m | 5:48AM0.38m | 5:09PM0.52m | 7:16AM0.41m | 5:14PM0.48m | 9:27AM0.45m | 4:57PM0.44m | 11:19AM0.53m | 12:18PM0.61m | ||||||||||
Low Tide | 9:37AM0.05m | 11:22PM0.13m | 10:12AM0.11m | 11:50PM0.10m | 10:52AM0.19m | 00:22AM0.07m | 11:44AM0.27m | 1:03AM0.04m | 1:35PM0.35m | 1:59AM0.02m | 3:11AM-0.00m | 4:25AM-0.03m | |||||||||
6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | 6:05 | — | — | |
— | 7:08 | — | — | 7:08 | — | — | 7:07 | — | — | 7:07 | — | — | 7:07 | — | — | 7:07 | — | — | 7:06 | — | |
mm | — | — | — | — | — | — | — | — | 1 | — | — | 1 | — | — | — | — | — | — | — | — | — |
Temp °C | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 |
Feels °C | 20 | 21 | 22 | 22 | 22 | 22 | 24 | 23 | 24 | 26 | 25 | 26 | 26 | 27 | 25 | 25 | 25 | 25 | 24 | 23 | 24 |
Swell 1 Height (m) Direction Period (s) | E 15 | E 14 | E 14 | E 14 | E 14 | E 13 | E 13 | E 12 | E 12 | SSW 12 | SSW 11 | S 13 | ENE 10 | ENE 9 | ENE 9 | ENE 8 | ENE 8 | ENE 8 | NE 10 | N 7 | NE 11 |
205 | 196 | 194 | 188 | 134 | 87 | 84 | 76 | 101 | 14 | 13 | 14 | 318 | 203 | 172 | 59 | 43 | 22 | 23 | 8 | 20 | |
Swell 2 Height (m) Direction Period (s) | N 8 | SSW 14 | N 10 | N 9 | N 9 | N 8 | N 8 | SSE 13 | SSW 12 | SSE 12 | N 10 | NNE 9 | NNE 9 | NNE 8 | S 12 | NNW 8 | NNW 8 | NNW 7 | NNW 7 | NE 9 | N 7 |
5 | 18 | 17 | 26 | 14 | 6 | 10 | 17 | 14 | 15 | 8 | 8 | 8 | 7 | 11 | 6 | 6 | 10 | 10 | 14 | 8 | |
Swell 3 Height (m) Direction Period (s) | SSW 14 | S 11 | SSW 14 | SSW 14 | SW 13 | SSW 13 | S 13 | N 8 | N 7 | N 11 | S 13 | SSW 11 | S 13 | S 12 | NNE 8 | S 12 | S 11 | ENE 10 | S 11 | ENE 12 | SW 14 |
19 | 9 | 19 | 19 | 7 | 17 | 13 | 4 | 4 | 2 | 3 | 12 | 13 | 12 | 6 | 11 | 10 | 11 | 9 | 14 | 8 | |
Wind waves Height (m) Direction Period (s) | E 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 11 | ENE 11 | ENE 10 | — | — | — | ENE 5 | ENE 5 | ENE 5 | ENE 6 | ENE 6 | E 7 |
890 | 824 | 908 | 682 | 650 | 533 | 402 | 331 | 370 | 582 | 496 | 460 | — | — | — | 45 | 32 | 74 | 109 | 140 | 302 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 138 | 55 | 52 | 118 | 146 | 46 | 15 | 46 | 15 | 15 | 9 | 15 | 15 | 15 | 15 | 44 | 44 | 44 | 44 | 44 | 44 |
Best forecast wave conditions in Oahu | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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Information about the Waimanalo Surf forecast
The above surf forecast table for Waimanalo provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Waimanalo can be found by selecting the local surf guide option on the grey menu. Our Waimanalo 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 (Waimanalo) 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 Waimanalo 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.
Waimanalo is 7 km (4 miles) from Kailua. If you plan a vacation in Oahu, look for hotels and other accommodation in Kailua. Kailua has rooms for a wide range of budgets as well as car hire and transport links.











