Surf Forecasts:
Rat Beach surf forecast from 16 Sep 2026:
- Best quality surf: Sunday 20 Sep, 5AM (local time) - 2ft (0.6m), 18s period, SW swell with cross-offshore winds.
- Most powerful swell: Monday 21 Sep, 11AM (local time) - 2.5ft (0.8m), 17s period, SW swell with 338 kJ wave energy.
- Next surfable swell (1★+): Tuesday 15 Sep, 11PM (local time) - 1ft (0.3m), 16s period with SW swell.
Best Forecast Surf Conditions for Rat Beach this week:
The surf forecast for Rat Beach over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Tuesday (Sep 15) at 11PM. The primary swell is predicted to be 0.3m and 16s period with a secondary swell of 0.4m and 8s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Rat Beach in the next 16 days are 0.8m 17s and forecast to arrive on Monday (Sep 21) at 11AM. Winds are predicted to be offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 17s period and expected on Wednesday (Sep 16) at 11AM.
| Wave Type | Time (PDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Tue 15th Sep) | 1ft (0.3m) 16s |
| Best Surf | 5AM (Sun 20th Sep) | 2ft (0.6m) 18s |
| Most Powerful | 11AM (Mon 21st Sep) | 2.5ft (0.8m) 17s |
Table - best surf conditions forecast for Rat Beach over the next 16 days.
The Lowdown
Alright folks, Rusty here. Let's get into it. For this stretch, we’re looking at a long run of small, clean windows at Rat Beach. It’s not going to knock your socks off with size, but there are a couple of mornings where it all comes together.
The opening days are pretty weak with a small 1ft swell from the southwest. The water temp is sitting at 73°, which is a whopping 8° warmer than normal for this time of year – that’s seriously unusual, a bit of a tropical surprise.
The standout is looking like Monday, September 21st, on the early bird session. That southwest swell bumps up to 3ft with a solid 17-second period, packing a moderate 388 units of energy. It’s not huge, but the real treat is the southeast offshore wind. That’ll put a clean face on the waves, and for a reef setup, that’s pure magic. This is the pick of the whole run – the kind of session you drag yourself out of bed for.
Don’t sleep on Sunday, September 20th, morning either. You've got a similar 2ft southwest swell, a 18-second period, and a clean 285 units of energy. With the southeast offshore breeze, it'll be glassy and lined up. A close second place.
After that, the pattern goes a bit stale. We get more small, clean mornings—like Tuesday the 22nd and Friday the 29th—with 2ft swells and cross-off winds, but nothing that gets the heart pumping. The afternoons are a write-off; that west wind picks up and turns everything into a choppy, cross-onshore mess. Late in the month, around the 26th and 27th, the swell drops back to a tiny 1ft, and the energy drops below 100 – barely a ripple. There’s a glassy morning on the 27th, but with almost no swell, it’s more of a float session than a surf.
So, in short: set your alarm for Monday the 21st, and maybe Sunday the 20th. The rest is for the diehards or the paddleboard crew. It’s a long wait between proper sessions.
Rusty.
Short Range ForecastMostly dry. Warm (max 21°C on Tue morning, min 19°C on Tue night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 21°C on Fri afternoon, min 19°C on Fri morning). Wind will be generally light. | ||||||||||||||||||||
Tuesday 15 | Wednesday 16 | Thursday 17 | Friday 18 | Saturday 19 | Sunday 20 | Monday 21 | |||||||||||||||
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 | SW 16 | SW 16 | W 5 | SW 15 | SW 14 | SW 21 | SW 21 | W 5 | SW 19 | SW 19 | SW 19 | SW 18 | SW 18 | SW 18 | SW 18 | SW 18 | SW 17 | SW 17 | SW 17 | SW 16 |
Wave Graph  | |||||||||||||||||||||
 kJ | 90 | 88 | 39 | 8 | 37 | 33 | 71 | 71 | 13 | 184 | 184 | 131 | 199 | 252 | 199 | 252 | 252 | 241 | 338 | 334 | 318 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | off | cross | off | cross-off | cross | glassy | cross | cross-on | cross | cross-off | cross-on | cross | cross-off | cross-on | cross-off | off | cross-on | glassy | off | cross | cross-off |
High Tide | 12:04PM1.98m | 1:39AM1.31m | 12:38PM1.89m | 4:30AM1.23m | 1:26PM1.80m | 2:47PM1.73m | 8:19AM1.44m | 4:29PM1.73m | 8:03AM1.50m | 5:42PM1.80m | 8:10AM1.56m | 6:33PM1.89m | |||||||||
Low Tide | 7:22PM0.64m | 5:47AM1.12m | 8:36PM0.71m | 10:17PM0.72m | 11:43PM0.65m | 10:16AM1.43m | 00:37AM0.56m | 11:59AM1.34m | 1:14AM0.48m | 12:47PM1.23m | 1:43AM0.42m | ||||||||||
 |  |  |  | | | | |  | | | | | | | | | | | | | |
 | 6:35 | — | — | 6:37 | — | — | 6:37 | — | — | 6:39 | — | — | 6:39 | — | — | 6:39 | — | — | 6:41 | — | — |
 | — | 6:59 | — | — | 6:58 | — | — | 6:57 | — | — | 6:54 | — | — | 6:53 | — | — | 6:52 | — | — | 6:51 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 21 | 21 | 19 | 20 | 20 | 19 | 20 | 20 | 20 | 20 | 21 | 20 | 20 | 21 | 21 | 21 | 21 | 21 | 20 | 20 | 20 |
Feels °C | 21 | 21 | 19 | 20 | 19 | 19 | 20 | 19 | 19 | 20 | 20 | 19 | 21 | 21 | 21 | 22 | 21 | 20 | 20 | 20 | 21 |
Swell 1 Height (m) Direction Period (s) | W 6 | W 9 | W 8 | SSW 17 | SSW 17 | S 16 | SSW 16 | SSW 15 | SSW 15 | W 5 | SW 19 | W 5 | SW 18 | SW 18 | W 6 | W 6 | SW 18 | W 6 | W 6 | SW 17 | SW 16 |
| kJ | 18 | 39 | 20 | 200 | 59 | 132 | 144 | 74 | 167 | 14 | 184 | 20 | 199 | 252 | 32 | 33 | 252 | 83 | 50 | 334 | 318 |
Swell 2 Height (m) Direction Period (s) | SW 16 | SW 16 | SW 16 | W 5 | SW 15 | W 5 | SW 21 | SW 14 | W 5 | SW 19 | SSW 14 | SSW 13 | W 5 | SSW 13 | SW 18 | SW 18 | SSW 12 | SW 17 | SW 17 | W 6 | W 6 |
| kJ | 90 | 88 | 39 | 8 | 37 | 4 | 71 | 32 | 13 | 184 | 61 | 59 | 14 | 56 | 199 | 252 | 29 | 241 | 338 | 25 | 24 |
Swell 3 Height (m) Direction Period (s) | W 9 | SSW 20 | SSW 19 | S 9 | S 13 | SW 14 | WSW 14 | SW 21 | SW 21 | SSW 14 | S 11 | SW 19 | SSW 13 | SW 21 | SSW 12 | SSW 12 | S 10 | SSW 12 | SSW 12 | SSW 12 | S 12 |
| kJ | 6 | 75 | 35 | 7 | 14 | 33 | 20 | 71 | 110 | 69 | 9 | 131 | 58 | 18 | 50 | 28 | 2 | 30 | 28 | 27 | 24 |
Wind waves Height (m) Direction Period (s) | — | — | — | — | WSW 5 | — | — | W 2 | — | — | W 5 | — | — | W 5 | — | — | W 6 | — | — | — | — |
| kJ | — | — | — | — | 9 | — | — | 1 | — | — | 12 | — | — | 14 | — | — | 35 | — | — | — | — |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 0 | 149 | 0 | 0 | 118 | 1 | 166 | 118 | 1 | 0 | 63 | 6 | 0 | 41 | 0 | 0 | 41 | 0 | 0 | 68 | 0 |
Best forecast wave conditions in Los Angeles County | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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Information about the Rat Beach Surf forecast
The above surf forecast table for Rat Beach provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Rat Beach can be found by selecting the local surf guide option on the grey menu. Our Rat 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 (Rat 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 Rat 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.
Rat Shit is 5 km (3 miles) from Redondo Beach. If you plan a vacation in Los Angeles County, look for hotels and other accommodation in Redondo Beach. Redondo Beach has rooms for a wide range of budgets as well as car hire and transport links.
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