Surf Forecasts:
In Betweens surf forecast from 19 Aug 2026:
- Best quality surf: Tuesday 25 Aug, 5PM (local time) - 5ft (1.5m), 8s period, E swell with cross-offshore winds.
- Most powerful swell: Monday 24 Aug, 11AM (local time) - 10ft (3.0m), 8s period, E swell with 1,352 kJ wave energy.
- Next surfable swell (1★+): Thursday 20 Aug, 5AM (local time) - 1.5ft (0.5m), 17s period with SW swell.
Best Forecast Surf Conditions for In Betweens this week:
The surf forecast for In Betweens over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Thursday (Aug 20) at 5AM. The primary swell is predicted to be 0.5m and 17s period with a secondary swell of 0.8m and 8s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at In Betweens in the next 16 days are 3.0m 8s and forecast to arrive on Monday (Aug 24) 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 0.9m 7s period and expected on Thursday (Aug 20) at 11PM.
| Wave Type | Time (HST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 5AM (Thu 20th Aug) | 1.5ft (0.5m) 17s |
| Best Surf | 5PM (Tue 25th Aug) | 5ft (1.5m) 8s |
| Most Powerful | 11AM (Mon 24th Aug) | 10ft (3.0m) 8s |
Table - best surf conditions forecast for In Betweens over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let’s have a look at what’s on offer for In Betweens.
Right from the start, we’ve got a bit of a waiting game. The first few days are pretty quiet. We see some small clean surf around the 20th of August, with a 1.9ft SSW groundswell pushing in with a very long 18-second period. That long period is a nice sign for a reef break like this, meaning proper shaped waves and easier paddling between sets. Thursday afternoon looks the pick early on, with offshore wind from the NNE at just 3 mph – that’s glassy conditions, the surface will be like a mirror. Just a heads up, this spot can get a crowd sometimes, so get in early.
Then it turns a bit average from Friday the 21st through the weekend and into the start of the following week. The wind cranks up from the ENE, mostly cross-off but getting strong, and while the swell height ticks up to around 2.3ft, the quality drops off. By Sunday the 23rd, the swell jumps to 6.2ft, but it’s short-period windswell from the ENE at only 7 seconds, and it’s lumpy. That setup looks more interesting for kite surfing than paddle surfing.
There’s a real gap of poor conditions from the 23rd of August right through until the end of the month. The swell gets bigger, but it’s messy, windy, and not worth your time. The 24th has a risk of thunderstorms and near gale-force winds – a hard pass.
Now, if you’re looking for the standout, you have to wait. Mark your calendar for the 1st and 2nd of September. The forecast shows a serious pulse of long-period groundswell from the E and ENE. We’re looking at 8.2ft on the 1st with a period of 13 seconds, and then 9.8ft on the 2nd with a 12 to 13-second period. This is big, powerful swell. However, at 8.2ft to 9.8ft, this is expert-only territory at a reef break. The wind stays cross-off from the ENE, so it will be clean, but it’s going to be a heavy, powerful ocean. This is a promising, but less certain long-range call – the bones of a proper swell are there, but keep an eye on it.
That’s the long and short of it. A quiet start, a rough middle, and a potential bomb at the end for the brave.
Short Range ForecastMostly dry. Warm (max 27°C on Thu afternoon, min 25°C on Wed morning). Wind will be generally light. | Days 4-6 Weather SummaryHeavy rain (total 40mm), heaviest during Mon night. Warm (max 26°C on Sat morning, min 24°C on Mon afternoon). Winds decreasing (near gales from the NE on Sun night, moderate winds from the ENE by Mon night). | ||||||||||||||||||||
Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | Monday 24 | Tuesday 25 | |||||||||||||||
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) | SW 16 | ENE 8 | ENE 7 | SSW 18 | SSW 17 | SW 16 | SW 17 | SW 16 | SSW 16 | SW 16 | SW 16 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | E 8 | E 8 | E 8 | ENE 8 | E 8 | ENE 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 129 | 149 | 157 | 207 | 200 | 274 | 291 | 261 | 322 | 261 | 255 | 293 | 350 | 421 | 768 | 1352 | 908 | 632 | 392 | 301 | 240 |
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 | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross-off | cross-off | cross-off | cross-off | cross-off |
High Tide | 10:13AM0.53m | 11:25AM0.56m | 10:11PM0.21m | 12:25PM0.59m | 00:08AM0.21m | 1:12PM0.63m | 1:06AM0.23m | 1:52PM0.66m | 1:46AM0.26m | 2:26PM0.67m | 2:21AM0.29m | 2:56PM0.68m | 2:55AM0.33m | ||||||||
Low Tide | 2:47AM0.12m | 8:27PM0.20m | 8:41PM0.17m | 5:06AM0.12m | 9:00PM0.16m | 6:08AM0.10m | 9:18PM0.14m | 6:59AM0.08m | 9:35PM0.13m | 7:43AM0.06m | 9:53PM0.11m | ||||||||||
 | |  |  | |  | | | | | | | | |  |  |  | | | |  | |
 | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — | 6:11 | — | — |
 | — | 6:58 | — | — | 6:57 | — | — | 6:57 | — | — | 6:55 | — | — | 6:54 | — | — | 6:53 | — | — | 6:52 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | 1 | 7 | 31 | 9 | 4 | 3 |
Temp °C | 25 | 26 | 25 | 26 | 27 | 26 | 27 | 27 | 27 | 26 | 26 | 25 | 26 | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 25 |
Feels °C | 26 | 26 | 25 | 28 | 30 | 30 | 30 | 29 | 29 | 26 | 23 | 23 | 22 | 22 | 22 | 21 | 22 | 22 | 26 | 26 | 25 |
Swell 1 Height (m) Direction Period (s) | E 8 | S 12 | ENE 7 | E 8 | ENE 7 | NE 7 | NE 7 | NE 7 | SSW 16 | SW 16 | SW 16 | SSW 16 | SW 15 | ESE 11 | E 12 | SSW 14 | SSW 13 | SSE 8 | ENE 8 | E 8 | SSW 15 |
| kJ | 86 | 45 | 157 | 71 | 108 | 84 | 79 | 79 | 322 | 261 | 255 | 212 | 115 | 102 | 72 | 127 | 156 | 60 | 392 | 301 | 121 |
Swell 2 Height (m) Direction Period (s) | SW 16 | SSW 16 | SW 16 | NE 6 | SSW 17 | SW 16 | SW 17 | SW 16 | W 10 | W 10 | W 11 | S 14 | S 13 | SSW 15 | SW 14 | SSE 13 | SSE 12 | SSW 13 | SSE 7 | S 6 | SSW 12 |
| kJ | 129 | 100 | 129 | 39 | 200 | 274 | 291 | 261 | 51 | 52 | 59 | 106 | 90 | 144 | 100 | 55 | 47 | 93 | 36 | 29 | 81 |
Swell 3 Height (m) Direction Period (s) | S 12 | SW 19 | S 12 | SSW 18 | W 11 | E 8 | W 11 | W 11 | S 13 | ESE 8 | S 12 | WNW 10 | SSW 15 | WNW 10 | SSE 13 | SSW 18 | SSW 18 | SSW 17 | SSW 12 | SSW 16 | SSW 18 |
| kJ | 44 | 92 | 45 | 207 | 37 | 18 | 56 | 83 | 54 | 20 | 47 | 35 | 76 | 20 | 57 | 62 | 31 | 94 | 86 | 142 | 109 |
Wind waves Height (m) Direction Period (s) | NE 7 | ENE 8 | NNE 6 | — | — | — | — | — | ENE 7 | ENE 6 | ENE 6 | ENE 7 | ENE 7 | ENE 7 | ENE 8 | E 8 | E 8 | E 8 | ENE 8 | ENE 8 | ENE 8 |
| kJ | 36 | 149 | 47 | — | — | — | — | — | 121 | 110 | 230 | 293 | 350 | 421 | 768 | 1352 | 908 | 632 | 207 | 186 | 240 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 1 | 1 | 1 | 0 | 0 | 0 | 1 | 1 | 1 | 32 | 41 | 38 | 201 | 201 | 157 | 148 | 126 | 126 | 30 | 0 | 30 |
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.
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