Surf Forecasts:
21st Street (Miami) surf forecast from 31 Aug 2026:
- Most powerful swell: Tuesday 1 Sep, 11PM (local time) - 1.5ft (0.4m), 11s period, E swell with 39 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 0.4m 11s and forecast to arrive on Tuesday (Sep 01) at 11PM. Winds are predicted to be onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 0.4m 4s period and expected on Friday (Sep 04) at 5PM.
| Wave Type | Time (EDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 11PM (Tue 1st Sep) | 1.5ft (0.4m) 11s |
Table - best surf conditions forecast for 21st Street (Miami) over the next 16 days.
The Lowdown
Alright, Rusty here. Let’s be straight with you: the next 16 days are a write-off for 21st Street (Miami). There’s nothing on the table worth paddling out for. We’ve got a long stretch of tiny, weak, and messy conditions, with no real surf to speak of.
Looking at the whole period, it’s a flat spell. The first few days—starting Sunday the 30th of August—are a total bust. Tiny swells around 1 ft to 2 ft, with short periods of 4 seconds, and cross-onshore winds from the ESE and SE at 9 to 12 mph. The water is sitting at 87°, a touch warmer than normal for this time of year, but that’s about the only thing going for it. The wave energy is super weak, barely registering (25–15), and the surface is choppy and messy. Not a single wave worth mentioning.
That pattern drags on through the week. Monday and Tuesday are more of the same: tiny, poor surf with cross-onshore or onshore wind, and energy levels still in the weak range. By Wednesday and Thursday, we get a few onshore bumps with a little more period, up to 10 seconds, but the swell heights are still only 1 ft to 1 ft. The surface is chopped up or unknown, and the scores are all zero. This is not a surf forecast; it’s a beach day forecast.
The second week doesn’t get any better. From the 6th of September onward, we’re looking at mostly glassy or light-wind mornings, but the swell is laughably small—0.3 ft to 0.7 ft. Periods creep up to 13 seconds on the 8th, but that’s a groundswell with no height to push it. The wave energy is almost non-existent (2–21). You’ll see a few glassy patches on the 7th, 8th, 10th, and 11th, but without any swell, it’s just a flat, calm ocean. The 14th of September brings a fresh breeze from the ENE at 19 mph and a tiny 2 ft of windswell, but it’s onshore and totally unsurfable.
Honestly, if you’re looking to get wet, this stretch is more interesting for a kite than a surfboard. The water’s warm, but the waves just aren’t here. For a spot that’s inconsistent at the best of times, a blank run like this isn’t unusual. Keep an eye on the charts—it tends not to stay this poor forever.
Rusty.
Short Range ForecastModerate rain (total 13mm), heaviest on Tue morning. Warm (max 30°C on Sun afternoon, min 29°C on Sun afternoon). Wind will be generally light. | Days 5-7 Weather SummaryHeavy rain (total 22mm), heaviest during Thu night. Warm (max 30°C on Wed afternoon, min 29°C on Wed night). Wind will be generally light. | |||||||||||||||||||
Sun 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | Friday 4 | Saturday 5 | ||||||||||||||
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 4 | E 8 | E 8 | E 8 | E 8 | E 8 | E 12 | E 11 | E 10 | E 10 | E 10 | ESE 4 | SE 4 | ESE 4 | SE 4 | E 8 | E 4 | SE 4 | SE 3 | E 8 |
Wave Graph  | ||||||||||||||||||||
 kJ | 8 | 5 | 21 | 11 | 10 | 4 | 11 | 37 | 33 | 17 | 16 | 25 | 21 | 20 | 22 | 5 | 9 | 6 | 3 | 1 |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | on | cross-on | on | on | cross-on | on | on | on | on | cross-on | cross-on | cross-on | cross-on | cross-on | cross-on | on | cross-on | cross-on | on |
High Tide | 10:32PM0.90m | 11:02AM0.92m | 11:11PM0.89m | 11:48AM0.91m | 11:53PM0.87m | 12:39PM0.88m | 00:42AM0.84m | 1:37PM0.85m | 1:40AM0.81m | 2:44PM0.83m | 2:50AM0.79m | 3:57PM0.83m | 4:07AM0.80m | |||||||
Low Tide | 4:28PM0.07m | 4:45AM0.01m | 5:09PM0.10m | 5:27AM0.01m | 5:53PM0.14m | 6:13AM0.02m | 6:42PM0.19m | 7:07AM0.05m | 7:41PM0.23m | 8:09AM0.08m | 8:50PM0.25m | 9:21AM0.10m | 10:06PM0.25m | |||||||
 |  |  | | |  | |  | | | |  | | | |  | | | | | |
 | — | — | 7:00 | — | — | 7:00 | — | — | 7:00 | — | — | 7:01 | — | — | 7:01 | — | — | 7:01 | — | — |
 | 7:42 | — | — | 7:40 | — | — | 7:39 | — | — | 7:38 | — | — | 7:37 | — | — | 7:37 | — | — | 7:36 | — |
mm | — | 3 | — | — | 2 | 6 | — | 2 | — | — | 2 | 3 | 2 | 11 | 2 | — | 2 | — | 2 | 5 |
Temp °C | 30 | 29 | 29 | 30 | 30 | 29 | 30 | 29 | 29 | 30 | 29 | 29 | 29 | 29 | 29 | 30 | 29 | 29 | 30 | 29 |
Feels °C | 33 | 32 | 32 | 33 | 33 | 32 | 33 | 32 | 32 | 33 | 30 | 31 | 31 | 32 | 31 | 32 | 32 | 31 | 32 | 31 |
Swell 1 Height (m) Direction Period (s) | NE 10 | SSE 4 | E 8 | E 8 | E 8 | E 8 | E 8 | E 11 | E 10 | E 10 | E 10 | E 9 | E 9 | E 9 | E 8 | SSE 4 | SSE 5 | E 8 | E 8 | SSE 4 |
| kJ | 4 | 4 | 21 | 11 | 10 | 4 | 5 | 37 | 33 | 17 | 16 | 14 | 14 | 6 | 5 | 6 | 2 | 1 | 1 | 2 |
Swell 2 Height (m) Direction Period (s) | E 6 | E 8 | NE 9 | NE 9 | NNE 5 | NE 4 | E 12 | NE 12 | NE 11 | NE 11 | NE 10 | NE 9 | NE 9 | NE 9 | NE 9 | E 8 | E 8 | E 8 | E 8 | E 8 |
| kJ | 1 | 5 | 3 | 3 | 2 | 1 | 11 | 5 | 5 | 4 | 4 | 3 | 3 | 3 | 3 | 5 | 5 | 1 | 1 | 1 |
Swell 3 Height (m) Direction Period (s) | E 8 | NE 5 | NE 4 | NE 4 | NE 8 | NE 8 | NE 4 | NE 9 | — | NE 4 | N 5 | — | — | — | — | NE 8 | NE 8 | — | — | N 8 |
| kJ | 1 | 1 | 1 | 1 | 3 | 3 | 1 | 3 | — | 1 | 1 | — | — | — | — | 3 | 3 | — | — | 1 |
Wind waves Height (m) Direction Period (s) | E 4 | E 4 | SSE 4 | SE 4 | ESE 3 | SE 4 | ESE 4 | E 4 | E 4 | E 4 | E 4 | ESE 4 | SE 4 | ESE 4 | SE 4 | E 4 | E 4 | SE 4 | SE 3 | E 3 |
| kJ | 8 | 3 | 1 | 3 | 3 | 3 | 5 | 9 | 12 | 8 | 10 | 25 | 21 | 20 | 22 | 2 | 9 | 6 | 3 | 1 |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 375 | 1178 | 173 | 731 | 384 | 360 | 338 | 895 | 338 | 338 | 338 | 338 | 1459 | 360 | 234 | 1634 | 369 | 731 | 1634 | 731 |
Best forecast wave conditions in South Florida | ||||||||||||||||||||
Best forecast wave conditions in United States | ||||||||||||||||||||
Header Global | ||||||||||||||||||||
- Map Icons:
Break
Live Wave Height (m)
Live Wind Speed (km/h)
Surf Rating (10 Max)
Ocean Swells (m)- Wind Speed (km/h)
FREE! Surf-Forecast.com widget for your website
The surf report / weather widget below is available to embed on third party websites free of charge and provides a summary of our 21st Street (Miami) surf forecast. Simply grab the html code snippet that we provide and paste it into your own site. You can choose your preferred language and metric/imperial units for the surf forecast feed to suit users of your site. Click here to get the code.
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.
Nearest