Surf Forecasts:
Waimanalo surf forecast from 31 Jul 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 cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 13s period and expected on Friday (Jul 31) at 2AM.
| 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, Rusty here. Let’s get straight into it.
Well, the truth is, for the next two weeks or so, the surf is really struggling. We’ve got swell on the way, but the wind is just ruining it almost every single day. If you’re desperate for a paddle, there are windows, but you’ll have to pick your moments.
We kick things off Friday morning, July 31st, at Waimanalo. The swell is a jumbled 7ft from the east, with a short period of 7 seconds. The combined energy is moderate, reading 596. But that ENE wind is howling at 22 mph, cross-onshore, making it lumpy and poor. It’s just not worth it. The water temp is about average for this time of year.
That poor quality sticks around for days. Saturday the 1st of August sees the swell building to 8ft from the east, with the combined energy jumping to a strong 1107, but the wind is on-shore and strong at 28 mph. That’s blown out and messy, only for experts, and even then, it’s no good. The period is still a weak 8 seconds.
The best you’re going to get is later in the week. Check out Wednesday morning, August 5th. The swell drops to 5ft from the ENE, with a 9-second period. Combined energy is only 336, so it’s weak, but the wind eases to a moderate 12 mph cross-onshore. It’s choppy, but it’s the cleanest the morning will be for a while.
The last real chance is way out there. Saturday morning, August 15th. It’s over two weeks away, so don’t bank on it, but the forecast has the swell at a tiny 4ft from the east, 6-second period, and a light 12 mph cross-onshore breeze. Combined energy is a very weak 109. It’s a long shot.
Overall, the wind is the story here. It’s relentless. For the most part, with the significant swell and poor surf quality, this setup is honestly more interesting for kite surfing than for paddle surfing.
Keep your eye on the sky, and the wind.
Rusty.
Short Range ForecastLight rain (total 2mm), mostly falling on Thu night. Warm (max 26°C on Thu night, min 25°C on Fri afternoon). Winds increasing (moderate winds from the E on Thu night, strong winds from the ENE by Fri night). | Days 5-7 Weather SummarySome drizzle, heaviest during Mon night. Warm (max 26°C on Tue afternoon, min 24°C on Sun night). Mainly fresh winds. | ||||||||||||||||||
Friday 31 | Saturday 1 | Sunday 2 | Monday 3 | Tuesday 4 | Wednesday 5 | ||||||||||||||
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 7 | E 7 | E 7 | E 8 | E 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 6 | ENE 11 | ENE 11 | ENE 10 | ENE 9 | ENE 9 | ENE 8 |
Wave Graph  | |||||||||||||||||||
 kJ | 277 | 416 | 439 | 847 | 902 | 807 | 908 | 740 | 688 | 560 | 394 | 339 | 178 | 593 | 505 | 433 | 322 | 218 | 216 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | on | cross-on | on | on | cross-on | on | on | on | on | on | cross-on | on | on | cross-on | cross-on | on | cross-on |
High Tide | 2:57AM0.35m | 4:27PM0.64m | 3:46AM0.36m | 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 | |||||||
Low Tide | 10:31PM0.18m | 9:04AM-0.01m | 10:57PM0.16m | 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 | ||||||
 |  | |  | | | |  | | | | |  | | | | | | | |
 | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:03 | — | — | 6:05 | — | — | 6:05 | — | — |
 | 7:09 | — | 7:09 | — | — | 7:08 | — | — | 7:08 | — | — | 7:07 | — | — | 7:07 | — | — | 7:07 | — |
mm | 2 | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — |
Temp °C | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 26 | 26 | 26 | 26 |
Feels °C | 26 | 25 | 21 | 21 | 21 | 20 | 22 | 21 | 21 | 22 | 23 | 24 | 23 | 25 | 26 | 27 | 27 | 26 | 26 |
Swell 1 Height (m) Direction Period (s) | E 16 | E 15 | E 16 | E 15 | E 15 | E 14 | E 14 | E 14 | E 14 | E 13 | E 12 | E 13 | E 12 | ENE 11 | ENE 11 | S 13 | NNE 9 | SSE 12 | NNE 8 |
| kJ | 81 | 157 | 231 | 205 | 205 | 196 | 194 | 138 | 134 | 87 | 78 | 84 | 141 | 593 | 505 | 14 | 8 | 29 | 6 |
Swell 2 Height (m) Direction Period (s) | S 13 | N 8 | N 8 | N 8 | SSW 14 | SSW 14 | N 10 | N 9 | N 9 | N 8 | N 8 | SSW 12 | SSW 12 | SSE 14 | SSW 12 | N 9 | S 13 | NNE 8 | S 12 |
| kJ | 53 | 23 | 12 | 5 | 19 | 18 | 17 | 26 | 24 | 12 | 10 | 15 | 14 | 21 | 13 | 7 | 13 | 7 | 11 |
Swell 3 Height (m) Direction Period (s) | N 9 | S 12 | S 12 | S 12 | S 12 | S 11 | SSW 14 | SSW 14 | SW 13 | S 13 | S 13 | N 8 | S 13 | SSW 12 | N 10 | SSW 11 | NE 12 | SSW 15 | S 11 |
| kJ | 14 | 27 | 26 | 11 | 10 | 9 | 20 | 19 | 7 | 13 | 13 | 4 | 3 | 14 | 8 | 12 | 6 | 22 | 9 |
Wind waves Height (m) Direction Period (s) | E 7 | E 7 | E 7 | E 8 | E 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 6 | — | — | ENE 10 | ENE 9 | ENE 9 | ENE 8 |
| kJ | 277 | 416 | 439 | 847 | 902 | 807 | 908 | 740 | 688 | 560 | 394 | 339 | 178 | — | — | 433 | 322 | 218 | 216 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 15 | 52 | 117 | 52 | 146 | 118 | 118 | 55 | 146 | 44 | 17 | 46 | 15 | 15 | 9 | 15 | 15 | 15 | 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.
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