
Surf Forecasts:
Sewers (Maili) surf forecast from 11 Aug 2026:
- Best quality surf: Sunday 16 Aug, 8AM (local time) - 3.5ft (1.1m), 8s period, NE swell with offshore winds.
- Most powerful swell: Saturday 15 Aug, 5PM (local time) - 3.5ft (1.1m), 8s period, NE swell with 159 kJ wave energy.
- Next surfable swell (1★+): Monday 10 Aug, 5PM (local time) - 2ft (0.6m), 7s period with NE swell.
Best Forecast Surf Conditions for Sewers (Maili) this week:
The surf forecast for Sewers (Maili) over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Aug 10) at 5PM. The primary swell is predicted to be 0.6m and 7s period. The wind is predicted to be offshore as the swell arrives.
The most powerful waves expected at Sewers (Maili) in the next 16 days are 1.1m 8s and forecast to arrive on Saturday (Aug 15) at 5PM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.4m 16s period and expected on Thursday (Aug 13) at 2AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5PM (Mon 10th Aug) | 2ft (0.6m) 7s |
| Best Surf | 8AM (Sun 16th Aug) | 3.5ft (1.1m) 8s |
| Most Powerful | 5PM (Sat 15th Aug) | 3.5ft (1.1m) 8s |
Table - best surf conditions forecast for Sewers (Maili) over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s break down the surf prospects for the West side over the next couple of weeks.
It’s going to be a slow start. There’s nothing worth rushing for until Monday morning, August 18th. From now through the weekend, we’re looking at a dry spell—roughly a week of flat or very poor conditions. Not worth dragging the board out.
Our only real standout spot to talk about is Sewers (Maili). Water temp is around 81°, which is about 1° warmer than normal for this time of year. Nothing unusual.
The first good opportunity hits on Monday morning, August 18th with a clean 4ft NE swell, period around 9 seconds (moderate energy around 220). The wind is a gentle offshore out of the ENE, so the surface will be tidy. That morning window is the pick of the entire forecast. It gets a bit less crisp in the afternoon, but still rideable. Crowds are a regular downside here, so get out early.
Then on Wednesday morning, August 19th, we get a tiny but interesting peak: a very long-period groundswell from the SW, 16 seconds, but only 2ft. Energy is still decent at 201, and with light offshore wind, it’ll shape up nicely, just small. That long period means better-shaped waves, but at a beach and reef spot like Sewers, it’ll be fine. A fun little bonus session.
After that, the window closes again from Thursday the 20th through the weekend, with weak or messy surf. By Saturday the 22nd, there’s a small 3ft NE swell with light offshore wind, but it’s fairly ordinary.
Heading into the last week of August, from Monday the 24th onward, we get a steadier run of chest-high NE swell around 4ft with moderate offshore winds. Nothing spectacular—just surfable but average—but the trade winds keep it clean. Energy sits in the moderate range (114-128). Mornings will be your best shot.
Bottom line: Monday the 18th morning is the one to aim for. Everything else is either flat or just okay.
This is Rusty, signing off.
Short Range ForecastMostly dry. Warm (max 28°C on Mon afternoon, min 24°C on Tue night). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 41mm), heaviest during Sat night. Warm (max 28°C on Thu morning, min 25°C on Thu night). Winds increasing (light winds from the ENE on Thu morning, gales from the N by Sat night). | ||||||||||||||||||||
Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | |||||||||||||||
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) | NE 7 | NE 7 | NNW 8 | SSW 15 | NE 7 | S 20 | S 18 | N 12 | NE 6 | NE 6 | W 12 | W 11 | NE 7 | NE 6 | NE 6 | W 11 | NE 8 | NE 7 | NE 7 | NE 7 | NE 7 |
Wave Graph | |||||||||||||||||||||
43 | 41 | 22 | 0 | 35 | 0 | 0 | 102 | 45 | 45 | 11 | 10 | 85 | 83 | 94 | 22 | 159 | 118 | 116 | 113 | 99 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | off | off | off | off | off | off | off | off | off | off | off | off | off | off | cross-off | cross-off | cross-off | cross | cross | cross-off |
High Tide | 2:10PM0.83m | 00:56AM0.34m | 2:44PM0.83m | 1:52AM0.38m | 3:14PM0.80m | 2:43AM0.42m | 3:41PM0.75m | 3:34AM0.46m | 4:04PM0.69m | 4:25AM0.49m | 4:21PM0.62m | 5:20AM0.50m | 4:31PM0.56m | ||||||||
Low Tide | 9:27PM0.27m | 7:04AM0.01m | 9:42PM0.25m | 7:51AM0.03m | 10:01PM0.23m | 8:34AM0.08m | 10:21PM0.21m | 9:16AM0.15m | 10:42PM0.19m | 9:57AM0.23m | 11:02PM0.17m | 10:40AM0.32m | 11:24PM0.16m | ||||||||
6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:11 | — | — | |
— | 7:06 | — | — | 7:05 | — | — | 7:05 | — | — | 7:04 | — | — | 7:02 | — | — | 7:02 | — | — | 7:01 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 41 | 9 | 13 | 1 |
Temp °C | 27 | 28 | 26 | 27 | 28 | 26 | 27 | 28 | 25 | 28 | 28 | 25 | 27 | 28 | 25 | 27 | 27 | 25 | 27 | 27 | 26 |
Feels °C | 28 | 29 | 26 | 28 | 28 | 26 | 28 | 27 | 25 | 27 | 26 | 25 | 26 | 26 | 24 | 26 | 25 | 23 | 29 | 24 | 25 |
Swell 1 Height (m) Direction Period (s) | SSW 15 | SSW 15 | SSW 15 | SSW 15 | SSW 14 | SSW 13 | S 18 | S 13 | S 16 | S 16 | S 15 | S 15 | S 14 | S 14 | S 14 | S 13 | S 13 | S 13 | S 13 | S 13 | NE 7 |
186 | 234 | 240 | 222 | 269 | 299 | 509 | 392 | 1029 | 868 | 773 | 636 | 503 | 411 | 311 | 284 | 222 | 222 | 153 | 160 | 99 | |
Swell 2 Height (m) Direction Period (s) | SSW 12 | SSW 12 | SSE 9 | ENE 7 | SE 9 | S 20 | SSW 13 | S 18 | SE 7 | W 12 | ESE 7 | W 11 | W 12 | SSW 18 | ESE 8 | W 11 | NNW 8 | S 18 | S 17 | S 16 | S 14 |
81 | 45 | 33 | 32 | 20 | 373 | 289 | 741 | 14 | 25 | 5 | 10 | 11 | 30 | 26 | 22 | 13 | 99 | 138 | 183 | 242 | |
Swell 3 Height (m) Direction Period (s) | NNW 9 | NNW 8 | NNW 8 | SSW 11 | S 21 | SE 8 | SE 9 | SW 18 | WNW 12 | SE 9 | W 12 | NNW 7 | NNW 7 | W 12 | W 11 | NNW 8 | S 19 | WNW 13 | ESE 11 | E 11 | E 11 |
27 | 24 | 22 | 40 | 79 | 18 | 19 | 12 | 28 | 12 | 11 | 5 | 5 | 11 | 21 | 14 | 65 | 55 | 38 | 38 | 36 | |
Wind waves Height (m) Direction Period (s) | NE 7 | NE 7 | ENE 7 | E 7 | NE 7 | ENE 6 | NE 6 | N 12 | NE 6 | NE 6 | NE 5 | ENE 6 | NE 7 | NE 6 | NE 6 | NE 7 | NE 8 | NE 7 | NE 7 | NE 7 | — |
43 | 41 | 35 | 106 | 35 | 26 | 39 | 102 | 45 | 45 | 41 | 67 | 85 | 83 | 94 | 122 | 159 | 118 | 116 | 113 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 0 | 1 | 1 | 1 | 1 | 1 | 0 | 0 | 0 | 161 | 6 | 0 | 161 | 0 | 161 | 161 | 143 | 191 | 165 | 21 |
Best forecast wave conditions in Oahu | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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Information about the Sewers (Maili) Surf forecast
The above surf forecast table for Sewers (Maili) provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Sewers (Maili) can be found by selecting the local surf guide option on the grey menu. Our Sewers (Maili) 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 (Sewers (Maili)) 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 Sewers (Maili) 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.
Sewers (Maili) is 13 km (8 miles) from Makakilo City. If you plan a vacation in Oahu, look for hotels and other accommodation in Makakilo City. Makakilo City has rooms for a wide range of budgets as well as car hire and transport links.











