Surf Forecasts:
21st Street (Miami) surf forecast from 11 Aug 2026:
- Most powerful swell: Saturday 15 Aug, 8AM (local time) - 3ft (0.9m), 5s period, ESE swell with 37 kJ wave energy.
Best Forecast Surf Conditions for 21st Street (Miami) this week:
The most powerful waves expected at 21st Street (Miami) in the next 16 days are 0.9m 5s and forecast to arrive on Saturday (Aug 15) at 8AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.6m 5s period and expected on Saturday (Aug 15) at 2PM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 8AM (Sat 15th Aug) | 3ft (0.9m) 5s |
Table - best surf conditions forecast for 21st Street (Miami) over the next 16 days.
The Lowdown
G'day, I'm Rusty, and I've gotta level with you – it's a pretty flat stretch ahead for us here in Miami. The surf just isn't showing up for a good, long while. We're looking at a solid two-week gap with nothing worth paddling out for, so don't be in a rush to wax your board.
From Tuesday, August 11th, right through to the end of the month, it's all tiny, weak, and wind-affected. The wave energy is pathetic, barely cracking double digits – we're talking combined energy readings of just 5 to 42, which is about as weak as it gets. Swell heights are a joke, mostly bouncing between 0.3 ft and 2 ft, and the periods are short, messy, and onshore. The wind is the main culprit, blowing cross-on or onshore for 90% of the time, turning what little bump there is into a choppy, blown-out mess.
The one tiny glimmer, and I mean tiny, comes right at the very end of the run. On Wednesday, August 26th, we get a bit of a pulse. The morning session at 21st Street (Miami) shows a 4 ft swell from the NNE, with a period of 9 seconds. The combined energy finally hits a moderate 175, and the wind is a light, cross-off breeze from the SW, making conditions clean. It's surfable, but the report calls it "very ordinary conditions," so keep your expectations low. It's still a small, short-period swell, so it won't have much punch. The afternoon sees the wind swing onshore and the swell drops back to 3 ft, so the morning window is the only chance.
The water temp is sitting at a warm 87° for the first day, which is about average for this time of year.
So, bottom line: there's nothing to get excited about for the next two weeks. If you're desperate, circle the morning of Wednesday, August 26th for a chance at some small, clean waves. Otherwise, it's a season for the beach or a longboard with no expectations.
Rusty
Short Range ForecastSome drizzle, heaviest during Thu night. Warm (max 30°C on Tue morning, min 28°C on Wed night). Wind will be generally light. | Days 4-6 Weather SummaryLight rain (total 4mm), mostly falling on Fri night. Warm (max 30°C on Sat afternoon, min 28°C on Sat morning). Wind will be generally light. | ||||||||||||||||||||
Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | Saturday 15 | Sunday 16 | Monday 17 | |||||||||||||||
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) | E 7 | E 7 | SE 5 | E 7 | NE 9 | SSE 5 | NE 8 | SE 3 | SE 3 | SE 4 | E 4 | ESE 4 | SE 5 | E 5 | SE 5 | E 8 | E 8 | SE 6 | E 8 | E 8 | NNE 7 |
Wave Graph  | |||||||||||||||||||||
 kJ | 4 | 14 | 6 | 3 | 3 | 3 | 3 | 3 | 4 | 10 | 5 | 25 | 33 | 10 | 32 | 6 | 5 | 15 | 12 | 5 | 9 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | on | cross-on | cross-on | cross-on | cross | cross-on | cross-on | cross-on | on | on | cross-on | cross-on | on | cross-on | cross-on | cross-on | cross-on | glassy | cross-on | cross-off |
High Tide | 8:13PM0.92m | 8:26AM0.91m | 9:01PM0.95m | 9:18AM0.93m | 9:47PM0.95m | 10:08AM0.94m | 10:31PM0.94m | 10:55AM0.92m | 11:14PM0.90m | 11:42AM0.88m | 11:55PM0.85m | 12:30PM0.84m | 00:37AM0.80m | ||||||||
Low Tide | 1:50PM-0.11m | 2:21AM-0.01m | 2:43PM-0.12m | 3:11AM-0.05m | 3:32PM-0.11m | 3:58AM-0.07m | 4:19PM-0.08m | 4:43AM-0.07m | 5:05PM-0.02m | 5:27AM-0.05m | 5:49PM0.04m | 6:12AM-0.01m | 6:35PM0.11m | ||||||||
 |  |  | | |  | | |  | | |  |  | | | | | | | | | |
 | 6:50 | — | — | 6:50 | — | — | 6:52 | — | — | 6:52 | — | — | 6:52 | — | — | 6:52 | — | — | 6:54 | — | — |
 | — | 7:59 | — | — | 7:58 | — | — | 7:58 | — | — | 7:57 | — | — | 7:55 | — | — | 7:54 | — | — | 7:53 | — |
mm | — | — | — | — | — | — | — | — | 1 | — | — | 3 | 1 | — | — | — | — | — | — | — | 1 |
Temp °C | 30 | 30 | 29 | 29 | 29 | 29 | 29 | 30 | 29 | 29 | 29 | 29 | 29 | 30 | 30 | 29 | 29 | 29 | 29 | 30 | 30 |
Feels °C | 33 | 33 | 32 | 33 | 31 | 32 | 32 | 32 | 34 | 32 | 31 | 30 | 30 | 32 | 32 | 31 | 30 | 31 | 33 | 32 | 31 |
Swell 1 Height (m) Direction Period (s) | SSE 4 | SSE 5 | E 7 | SSE 4 | E 7 | E 7 | E 7 | E 7 | E 7 | E 7 | SSE 4 | NE 9 | NE 12 | SSE 5 | E 8 | SSE 5 | SSE 6 | E 8 | SSE 4 | NNE 7 | NNE 7 |
| kJ | 4 | 5 | 3 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 3 | 3 | 6 | 22 | 5 | 14 | 10 | 5 | 2 | 5 | 9 |
Swell 2 Height (m) Direction Period (s) | E 7 | NE 8 | NE 8 | E 7 | NE 9 | NE 8 | NE 8 | NE 9 | NE 9 | NE 9 | E 7 | N 13 | NE 9 | NE 12 | NE 11 | E 8 | E 8 | NE 10 | E 8 | E 8 | E 8 |
| kJ | 4 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 1 | 3 | 3 | 5 | 5 | 5 | 5 | 4 | 12 | 5 | 5 |
Swell 3 Height (m) Direction Period (s) | NE 9 | NE 9 | — | NE 8 | N 9 | — | — | — | E 9 | E 9 | NE 9 | E 10 | — | NE 9 | — | NE 11 | NE 10 | N 10 | N 8 | — | SSE 5 |
| kJ | 3 | 3 | — | 3 | 1 | — | — | — | 2 | 2 | 3 | 2 | — | 3 | — | 4 | 4 | 2 | 1 | — | 3 |
Wind waves Height (m) Direction Period (s) | E 4 | E 7 | SE 5 | — | SE 3 | SSE 5 | SE 4 | SE 3 | SE 3 | SE 4 | E 4 | ESE 4 | SE 5 | E 5 | SE 5 | E 4 | E 4 | SE 6 | — | SE 3 | SSW 3 |
| kJ | 3 | 14 | 6 | — | 1 | 2 | 1 | 2 | 4 | 10 | 5 | 25 | 33 | 10 | 32 | 6 | 3 | 15 | — | 3 | 1 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 1634 | 1326 | 941 | 943 | 1677 | 915 | 1236 | 1562 | 765 | 899 | 731 | 448 | 1326 | 1634 | 360 | 234 | 731 | 314 | 314 | 324 | 236 |
Best forecast wave conditions in South Florida | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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Information about the 21st Street (Miami) Surf forecast
The above surf forecast table for 21st Street (Miami) provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at 21st Street (Miami) can be found by selecting the local surf guide option on the grey menu. Our 21st Street (Miami) 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 (21st Street (Miami)) 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 21st Street (Miami) 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.
21st Street (Miami) is 1 km (1 miles) from the city of Miami Beach. If you plan a vacation in South Florida, look for hotels and other accommodation in Miami Beach. Miami Beach has rooms for a wide range of budgets as well as car hire and transport links.
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