Surf Forecasts:
Sandy Beach surf forecast from 27 Aug 2026:
- Most powerful swell: Thursday 27 Aug, 11AM (local time) - 3.5ft (1.1m), 17s period, S swell with 716 kJ wave energy.
Best Forecast Surf Conditions for Sandy Beach this week:
The most powerful waves expected at Sandy Beach in the next 16 days are 1.1m 17s and forecast to arrive on Thursday (Aug 27) at 11AM. Winds are predicted to be cross-shore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.5m 17s period and expected on Saturday (Aug 29) at 11PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 11AM (Thu 27th Aug) | 3.5ft (1.1m) 17s |
Table - best surf conditions forecast for Sandy Beach over the next 16 days.
The Lowdown
Alright, Rusty here, giving you the lowdown for Sandy Beach.
The first stretch is a real bummer. From Thursday, August 27th, all the way through Monday, September 7th, it’s a no-go. That’s over ten days of strong, lumpy cross-shore winds and messy surf. The swell energy is just moderate, hovering around the 500 to 900 mark, and the swell is coming from the ENE, not the ESE this break wants to see. Water temp is about 81°F, which is standard for this time of year.
Now, things start to turn on Monday, September 7th, in the morning. The wind begins to ease, and by Tuesday, September 8th morning, we’ve got real energy – a combined swell energy of 1315 with a 7ft swell from the ENE, a 10-second period, and a moderate cross-shore breeze. It’s not glassy, but it’s a lot cleaner than the junk before. This is solid, intermediate-to-strong surf.
The absolute standout is Friday, September 11th. That morning, a massive 10ft swell from the ENE comes through, with a 9-second period. That’s well over 8ft, so it’s expert territory only. The wind turns light onshore from the ESE at just 6 mph, which could make for some surprisingly clean faces at that size. The combined swell energy hits 2105 – that’s powerful, heavy, deep ocean energy. The forecast also warns it might be too big for this beach-and-reef setup, so expect heavy shorebreak and strong rips. Crowds are common here anyway, but on a day like this, only the hardcore will be out.
From the 8th to the 11th, you’ve got solid 6ft to 8ft swell with a moderate cross-shore breeze, giving some decent but not perfect waves for experienced surfers.
So, the first week and a half is a total loss. Your window is early September, with Tuesday the 8th and especially Friday the 11th being the days to circle. That Friday is big, dangerous, and potentially epic for those who can handle it.
Rusty.
Short Range ForecastMostly dry. Warm (max 26°C on Thu morning, min 25°C on Thu morning). Mainly strong winds. | Days 4-6 Weather SummarySome drizzle, heaviest during Mon night. Warm (max 26°C on Sun morning, min 25°C on Sun morning). Mainly strong winds. | ||||||||||||||||||||
Thursday 27 | Friday 28 | Saturday 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | |||||||||||||||
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) | S 17 | S 16 | S 16 | S 14 | S 14 | S 13 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 716 | 427 | 482 | 260 | 329 | 229 | 177 | 276 | 326 | 235 | 229 | 257 | 315 | 423 | 423 | 466 | 423 | 343 | 423 | 373 | 341 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-on | cross | cross | cross | cross | cross | cross-on | cross | cross | cross | cross | cross | cross | cross | cross | cross-on | cross | cross | cross-on |
High Tide | 2:53PM0.66m | 3:07AM0.39m | 3:21PM0.62m | 3:47AM0.44m | 3:48PM0.58m | 4:31AM0.49m | 4:17PM0.51m | 5:19AM0.53m | 4:46PM0.43m | 6:14AM0.56m | 5:18PM0.36m | 7:19AM0.59m | 5:54PM0.28m | ||||||||
Low Tide | 8:15AM0.04m | 9:49PM0.07m | 8:57AM0.06m | 10:10PM0.06m | 9:43AM0.10m | 10:32PM0.05m | 10:34AM0.14m | 10:56PM0.04m | 11:35AM0.19m | 11:23PM0.04m | 12:53PM0.23m | 11:56PM0.04m | 2:47PM0.24m | 00:39AM0.05m | |||||||
 | |  | | | |  | | | | | | | |  | | | | | | | |
 | 6:11 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — | 6:13 | — | — |
 | — | 6:51 | — | — | 6:50 | — | — | 6:49 | — | — | 6:47 | — | — | 6:46 | — | — | 6:46 | — | — | 6:45 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | — | — | — | — | — | 2 |
Temp °C | 26 | 25 | 25 | 25 | 26 | 25 | 25 | 26 | 25 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 |
Feels °C | 24 | 22 | 22 | 22 | 23 | 21 | 21 | 23 | 22 | 23 | 23 | 24 | 23 | 24 | 24 | 25 | 24 | 25 | 25 | 25 | 26 |
Swell 1 Height (m) Direction Period (s) | S 17 | S 16 | S 16 | S 14 | S 14 | S 13 | E 13 | E 12 | S 12 | SSW 16 | S 12 | SSW 15 | SSW 15 | SSW 14 | S 10 | S 18 | S 18 | S 17 | S 16 | S 16 | S 15 |
| kJ | 716 | 427 | 482 | 260 | 329 | 229 | 126 | 110 | 102 | 171 | 100 | 199 | 144 | 136 | 51 | 311 | 311 | 277 | 334 | 318 | 275 |
Swell 2 Height (m) Direction Period (s) | N 8 | SSW 12 | NNE 7 | E 16 | E 15 | E 14 | S 13 | S 13 | E 12 | E 11 | SSW 16 | S 11 | S 11 | S 11 | S 19 | SSW 14 | S 12 | S 11 | E 16 | E 15 | E 14 |
| kJ | 6 | 46 | 10 | 78 | 109 | 146 | 85 | 89 | 106 | 65 | 162 | 59 | 57 | 55 | 192 | 116 | 75 | 60 | 121 | 150 | 194 |
Swell 3 Height (m) Direction Period (s) | NW 9 | NNE 8 | E 17 | SSW 11 | SSW 19 | SW 19 | S 13 | S 12 | SSW 17 | SSW 12 | E 11 | ENE 10 | S 21 | SSW 19 | SW 14 | SSE 9 | SW 14 | E 17 | SSE 10 | SSE 9 | S 11 |
| kJ | 3 | 7 | 24 | 22 | 36 | 56 | 89 | 75 | 186 | 46 | 61 | 37 | 34 | 122 | 53 | 8 | 51 | 53 | 35 | 29 | 36 |
Wind waves Height (m) Direction Period (s) | E 6 | ENE 6 | E 6 | ENE 6 | ENE 6 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 | ENE 8 |
| kJ | 213 | 144 | 206 | 115 | 128 | 172 | 177 | 276 | 326 | 235 | 229 | 257 | 315 | 423 | 423 | 466 | 423 | 343 | 423 | 373 | 341 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 50 | 48 | 47 | 47 | 110 | 47 | 55 | 57 | 55 | 49 | 57 | 47 | 48 | 55 | 16 | 47 | 55 | 20 | 47 | 47 | 47 |
Best forecast wave conditions in Oahu | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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Information about the Sandy Beach Surf forecast
The above surf forecast table for Sandy Beach provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Sandy Beach can be found by selecting the local surf guide option on the grey menu. Our Sandy Beach 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 (Sandy Beach) 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 Sandy Beach 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.
Sandy's Beach is 15 km (9 miles) from the city of 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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