Surf Forecasts:
In Betweens surf forecast from 13 Aug 2026:
- Most powerful swell: Sunday 16 Aug, 5AM (local time) - 13ft (4.0m), 10s period, E swell with 2,980 kJ wave energy.
Best Forecast Surf Conditions for In Betweens this week:
The most powerful waves expected at In Betweens in the next 16 days are 4.0m 10s and forecast to arrive on Sunday (Aug 16) at 5AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.8m 7s period and expected on Thursday (Aug 20) at 5AM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 5AM (Sun 16th Aug) | 13ft (4.0m) 10s |
Table - best surf conditions forecast for In Betweens over the next 16 days.
The Lowdown
Alright crew, Rusty here with a look at what’s on the cards for In Betweens.
Alright, let's be straight up. The next couple of weeks are a mixed bag for In Betweens, this exposed reef break that works best on a SSE swell. The first week is pretty much a write-off due to howling winds, then we get a glimpse of something cleaner, but much smaller. The main standout window looks like it might be the very start of the second week, but it's far out, so don't book the road trip just yet.
We kick off Thursday the 13th of August with a clean, cross-off breeze, but the swell is a weak 3 ft from the south at 16 seconds. The energy is moderate at best (847). That long period means there’s some proper groundswell in the water, so there’ll be long lulls, but when a set comes through at a reef like this, it could offer up a decent, clean shape for the beginners this spot is known for. However, it’s marginal at best. The water temp is about average for this time of year.
Friday the 14th sees the swell bump up to 7 ft, but the direction swings east-northeast, which is pretty much the wrong way for this break. The period drops to a short, weak 8 seconds too, and with a fresh to strong cross-off breeze, it’s messy. Saturday the 15th is a write-off – an 12 ft swell from the east is just raw power (strong energy, 1981-2281) and the wind is a near gale. That’s expert-only territory and honestly, looks more like a kite-surfing day than a paddle day.
Sunday the 16th through to Tuesday the 19th is a real low point. The swell drops off, the wind stays strong, and the wave period is short and choppy. There's a gap of several poor days here where you wouldn't even bother paddling out.
Then, finally, a shift. From Wednesday the 20th of August through the end of the window, we see the wind dropping to a moderate breeze and the swell flipping back to the southwest. The size is tiny, 1 ft to 2 ft on the 20th and 21st, but that’s paired with a very long period of 17-18 seconds. For a reef setup, that’s actually perfect – the long period straightens out into nice, lined-up waves, even if they’re small. The energy is weak (227-425) but clean.
The real highlight, the one you want to circle on the calendar, is the tail end. On Friday the 28th of August, things look promising. The swell is forecast to be back up to 7 ft from the east-northeast. It’s a short period windswell at 7 seconds, so the energy is moderate (634), but it’s the first time in ages the size is up and the wind is just a fresh cross-off. For the more experienced crew, that could be a fun, clean session if the tide lines up. It's a long-range call, so keep an eye on it, but it's the best bet on the board.
Stay stoked,
Rusty.
Short Range ForecastMostly dry. Warm (max 27°C on Thu morning, min 25°C on Thu night). Mainly strong winds. | Days 4-6 Weather SummaryHeavy rain (total 22mm), heaviest during Sun afternoon. Warm (max 26°C on Sun morning, min 25°C on Sun afternoon). Winds decreasing (near gales from the ENE on Sun morning, moderate winds from the ENE by Mon afternoon). | ||||||||||||||||||||
Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | |||||||||||||||
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 16 | S 15 | S 15 | ENE 8 | ENE 8 | ENE 8 | E 9 | E 9 | E 9 | E 9 | ENE 9 | ENE 8 | ENE 8 | S 14 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | SW 16 |
Wave Graph | |||||||||||||||||||||
501 | 662 | 537 | 526 | 536 | 946 | 1747 | 2353 | 2857 | 2424 | 1033 | 561 | 358 | 268 | 225 | 165 | 154 | 158 | 135 | 133 | 129 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 4:48PM0.69m | 5:17AM0.40m | 5:22PM0.62m | 6:06AM0.44m | 5:54PM0.53m | 6:57AM0.47m | 6:24PM0.45m | 7:54AM0.49m | 6:52PM0.37m | 8:59AM0.51m | 7:16PM0.30m | 10:13AM0.53m | |||||||||
Low Tide | 9:58AM0.03m | 11:36PM0.04m | 10:49AM0.08m | 00:03AM0.04m | 11:43AM0.14m | 00:30AM0.05m | 12:43PM0.20m | 00:58AM0.06m | 1:59PM0.25m | 1:27AM0.08m | 3:56PM0.27m | 2:01AM0.10m | 2:47AM0.12m | ||||||||
6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:09 | — | — | 6:11 | — | — | |
— | 7:02 | — | — | 7:01 | — | — | 7:00 | — | — | 7:00 | — | — | 7:00 | — | — | 6:59 | — | — | 6:58 | — | |
mm | — | — | — | — | — | — | — | — | — | — | 8 | 6 | 5 | 2 | 1 | — | — | — | — | — | — |
Temp °C | 27 | 27 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 25 | 26 | 26 | 25 | 26 | 26 | 25 |
Feels °C | 24 | 24 | 24 | 22 | 23 | 23 | 23 | 22 | 22 | 21 | 23 | 23 | 27 | 26 | 24 | 23 | 24 | 24 | 25 | 25 | 25 |
Swell 1 Height (m) Direction Period (s) | S 16 | S 15 | S 15 | S 14 | S 14 | S 14 | S 13 | S 13 | S 13 | S 13 | SSE 10 | ENE 8 | S 14 | S 14 | S 13 | S 13 | ENE 7 | S 13 | SW 16 | S 12 | SW 16 |
501 | 662 | 537 | 411 | 411 | 243 | 222 | 168 | 176 | 119 | 634 | 561 | 264 | 260 | 170 | 165 | 154 | 80 | 129 | 45 | 129 | |
Swell 2 Height (m) Direction Period (s) | SSW 12 | W 12 | W 11 | W 12 | E 11 | W 11 | W 11 | S 16 | S 18 | SSE 12 | S 16 | SSE 8 | SSE 7 | SSE 6 | SSE 6 | SW 17 | S 13 | SSE 6 | S 12 | SSW 16 | S 12 |
113 | 11 | 10 | 11 | 62 | 9 | 22 | 80 | 56 | 94 | 127 | 102 | 36 | 12 | 6 | 74 | 119 | 13 | 44 | 100 | 45 | |
Swell 3 Height (m) Direction Period (s) | W 12 | SW 19 | SW 18 | SW 18 | W 12 | SSW 17 | S 20 | W 13 | W 13 | S 16 | W 12 | S 14 | SW 18 | SSW 19 | W 11 | E 9 | SW 18 | SW 18 | SSE 9 | SSE 9 | SSE 9 |
11 | 14 | 13 | 12 | 11 | 28 | 30 | 30 | 30 | 132 | 25 | 246 | 50 | 37 | 9 | 15 | 79 | 79 | 25 | 15 | 16 | |
Wind waves Height (m) Direction Period (s) | ENE 6 | ENE 7 | E 7 | ENE 8 | ENE 8 | ENE 8 | E 9 | E 9 | E 9 | E 9 | ENE 9 | — | ENE 8 | ENE 7 | ENE 7 | ENE 7 | — | ENE 7 | ENE 7 | ENE 8 | ENE 7 |
233 | 307 | 537 | 526 | 536 | 946 | 1747 | 2353 | 2857 | 2424 | 1033 | — | 358 | 268 | 225 | 158 | — | 158 | 135 | 133 | 124 | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 44 | 45 | 30 | 44 | 127 | 44 | 129 | 201 | 127 | 201 | 126 | 47 | 30 | 1 | 30 | 31 | 31 | 1 | 1 | 1 | 1 |
Best forecast wave conditions in Oahu | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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Information about the In Betweens Surf forecast
The above surf forecast table for In Betweens provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at In Betweens can be found by selecting the local surf guide option on the grey menu. Our In Betweens 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 (In Betweens) 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 In Betweens 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.
In Betweens is 4 km (2 miles) from Honolulu. If you plan a vacation in Oahu, look for hotels and other accommodation in Honolulu. Honolulu has rooms for a wide range of budgets as well as car hire and transport links.











