
Surf Forecasts:
Waimanalo surf forecast from 3 Sep 2026:
- Best quality surf: Tuesday 8 Sep, 11PM (local time) - 3.5ft (1.1m), 9s period, E swell with cross-offshore winds.
- Most powerful swell: Monday 7 Sep, 11PM (local time) - 8ft (2.5m), 12s period, ENE swell with 2,089 kJ wave energy.
- Next surfable swell (1★+): Tuesday 8 Sep, 11PM (local time) - 3.5ft (1.1m), 9s period with E swell.
Best Forecast Surf Conditions for Waimanalo this week:
The surf forecast for Waimanalo over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Sep 08) at 11PM. The primary swell is predicted to be 1.1m and 9s period with a secondary swell of 0.8m and 9s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Waimanalo in the next 16 days are 2.5m 12s and forecast to arrive on Monday (Sep 07) at 11PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 3.0m 7s period and expected on Tuesday (Sep 08) at 8AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Tue 8th Sep) | 3.5ft (1.1m) 9s |
| Best Surf | 11PM (Tue 8th Sep) | 3.5ft (1.1m) 9s |
| Most Powerful | 11PM (Mon 7th Sep) | 8ft (2.5m) 12s |
Table - best surf conditions forecast for Waimanalo over the next 16 days.
The Lowdown
Alright folks, Rusty here, and I’ve stared at the charts for the next couple weeks, and phew, it’s looking pretty grim for a paddle. It’s not often I have to say this, but right now the whole sixteen-day window is basically a write-off for decent surf. The breaks are simply not cooperating, and what’s on offer is blown out or just messy. There’s a long, sad gap right from the start all the way through.
Let’s start with Waimanalo. Right now, from September 2nd all the way through the morning of September 8th, it’s just no good. The wind is howling from the ENE, mostly 18 to 25 mph straight onshore or cross-onshore, and the wave comment is a clear “poor surf conditions” every time. You’ve got a solid 7 ft to 8 ft of ENE windswell running with a short period of 7 to 8 seconds, but the combined energy is high, in the 600s to over 2000, but it’s all raw, messy, blown-out junk. For a beginner break, that 7 ft+ range is already too much, and with that wind, it’s a washing machine.
On September 5th you get a 8 ft swell with 14-second period and combined energy well over 2000 (2004), but the wind is a fresh 18 mph ENE cross-onshore making it lumpy. That’s a big chunk of raw power hitting the beach – honestly looks more interesting for a kite surfer than a paddle surfer. That long period would be sweet if the wind was offshore, but it’s not.
Then we get a tiny flicker of hope. On the morning of September 8th, the wind finally swings around to the south at 28 mph, giving a cross-offshore flow, and the wave comment says “clean”. The swell drops to 6 ft from the ENE with an 11-second period and combined energy around 955 (moderate). It’s still a bit on the big side for beginners, and the water temp is the usual balmy 81°, about average for this time of year. But for a more experienced surfer, that early Tuesday could be the only window where it’s not completely terrible. That afternoon stays marginal with a 5 ft ENE swell and cross-off wind at 18 mph. It’s not a standout, it’s just the least bad option in a very long, poor stretch.
After that, the rest of the run is a slow fade. From September 9th onward, the swell drops way down to under 3 ft, the wind stays onshore or cross-onshore, and the wave comment stays stuck on “poor surf conditions.” It’s all small, weak, and bumpy with combined energy in the low hundreds. Periods stretch out to 13 or 14 seconds on those tiny swells, but that means long waits for barely rideable lumps. It’s not worth suiting up for.
There are no standouts. The only day that even gets a score of 1 out of 10 is the morning of the 8th, and it’s still a marginal call. The rest is a solid zero. Honestly, for an area that usually isn’t this bad for this long, it’s a real bummer. Forecasts can change, but as it sits right now, put the board away and go do something else.
Rusty.
Short Range ForecastSome drizzle, heaviest during Thu morning. Warm (max 26°C on Wed afternoon, min 25°C on Wed afternoon). Mainly strong winds. | Days 5-7 Weather SummaryHeavy rain (total 28mm), heaviest during Sun night. Warm (max 27°C on Mon night, min 24°C on Sun night). Winds increasing (light winds from the E on Sun night, near gales from the SSE by Mon night). | |||||||||||||||||||
Wed 2 | Thursday 3 | Friday 4 | Saturday 5 | Sunday 6 | Monday 7 | Tuesday 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) | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | E 14 | E 14 | E 14 | ENE 14 | ENE 14 | ENE 13 | ENE 13 | ENE 12 | ENE 12 | ENE 13 | ENE 12 | ENE 12 | ENE 11 | ENE 10 | ENE 9 |
Wave Graph | ||||||||||||||||||||
549 | 542 | 498 | 443 | 431 | 417 | 485 | 561 | 1970 | 1807 | 1654 | 1550 | 1231 | 1316 | 1697 | 1788 | 2089 | 837 | 472 | 222 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | on | on | on | on | on | on | cross-on | on | on | on | cross-on | cross-on | on | cross-on | cross-off | cross-off | cross-off | cross-off |
High Tide | 3:54PM0.43m | 9:02AM0.54m | 10:54AM0.59m | 11:56AM0.64m | 12:39PM0.68m | 11:21PM0.29m | 1:14PM0.70m | 00:23AM0.35m | 1:44PM0.70m | 1:12AM0.41m | ||||||||||
Low Tide | 00:03AM0.02m | 1:10AM0.03m | 2:48AM0.04m | 4:19AM0.02m | 8:00PM0.22m | 5:27AM-0.01m | 7:55PM0.20m | 6:20AM-0.02m | 8:07PM0.17m | |||||||||||
— | — | 6:13 | — | — | 6:15 | — | — | 6:15 | — | — | 6:15 | — | — | 6:15 | — | — | 6:15 | — | — | |
6:45 | — | — | 6:45 | — | — | 6:44 | — | — | 6:43 | — | — | 6:42 | — | — | 6:40 | — | — | 6:39 | — | |
mm | — | — | 1 | — | — | — | — | — | — | — | 1 | — | — | 8 | 2 | 3 | 10 | 4 | 1 | — |
Temp °C | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 25 | 26 | 26 | 25 | 26 | 26 | 26 | 25 | 26 | 27 | 27 | 27 | 27 |
Feels °C | 24 | 22 | 22 | 21 | 21 | 21 | 22 | 21 | 24 | 25 | 24 | 25 | 25 | 26 | 24 | 24 | 25 | 24 | 25 | 29 |
Swell 1 Height (m) Direction Period (s) | S 16 | E 13 | E 13 | SSE 13 | E 14 | E 14 | E 14 | E 14 | S 12 | S 12 | S 11 | SSW 12 | ENE 12 | SSW 14 | SSW 13 | SW 14 | SSW 15 | ENE 11 | ENE 10 | ENE 9 |
79 | 123 | 121 | 195 | 264 | 357 | 485 | 561 | 129 | 134 | 166 | 113 | 1231 | 173 | 156 | 203 | 794 | 837 | 472 | 222 | |
Swell 2 Height (m) Direction Period (s) | E 14 | S 15 | SSE 12 | E 12 | SSE 12 | S 12 | S 11 | S 11 | NNE 10 | NNE 10 | N 8 | SSE 10 | SSW 12 | SSE 10 | SSE 10 | S 10 | NW 12 | E 14 | E 14 | E 14 |
66 | 68 | 59 | 107 | 152 | 141 | 91 | 86 | 34 | 19 | 12 | 19 | 138 | 32 | 34 | 48 | 37 | 97 | 134 | 136 | |
Swell 3 Height (m) Direction Period (s) | S 11 | SSE 15 | S 14 | SSW 14 | NW 9 | N 9 | N 12 | S 13 | SW 18 | SSW 17 | N 11 | SSW 16 | SSE 10 | SSW 18 | SSW 17 | S 17 | NW 12 | NW 12 | SSW 15 | SSW 14 |
23 | 23 | 65 | 38 | 3 | 1 | 3 | 55 | 12 | 29 | 9 | 50 | 18 | 66 | 93 | 147 | 37 | 21 | 73 | 68 | |
Wind waves Height (m) Direction Period (s) | ENE 8 | ENE 8 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 14 | ENE 14 | ENE 13 | ENE 13 | — | ENE 12 | ENE 13 | ENE 12 | ENE 12 | S 8 | S 10 | S 9 |
549 | 542 | 498 | 443 | 431 | 417 | 446 | 394 | 1970 | 1807 | 1654 | 1550 | — | 1316 | 1697 | 1788 | 2089 | 1106 | 680 | 129 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 55 | 57 | 138 | 117 | 50 | 55 | 116 | 117 | 50 | 52 | 17 | 44 | 44 | 9 | 44 | 57 | 115 | 142 | 131 | 0 |
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.










