
Surf Forecasts:
Devonport Rivermouth surf forecast from 8 Aug 2026:
- Best quality surf: Monday 10 Aug, 7AM (local time) - 4.5ft (1.3m), 7s period, NNE swell with cross-offshore winds.
- Most powerful swell: Wednesday 12 Aug, 10AM (local time) - 8ft (2.5m), 8s period, NW swell with 875 kJ wave energy.
- Next surfable swell (1★+): Monday 10 Aug, 7AM (local time) - 4.5ft (1.3m), 7s period with NNE swell.
Best Forecast Surf Conditions for Devonport Rivermouth this week:
The surf forecast for Devonport Rivermouth over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Monday (Aug 10) at 7AM. The primary swell is predicted to be 1.3m and 7s period with a secondary swell of 0.7m and 7s. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Devonport Rivermouth in the next 16 days are 2.5m 8s and forecast to arrive on Wednesday (Aug 12) at 10AM. Winds are predicted to be cross-offshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 6s period and expected on Tuesday (Aug 11) at 1PM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Mon 10th Aug) | 4.5ft (1.3m) 7s |
| Best Surf | 7AM (Mon 10th Aug) | 4.5ft (1.3m) 7s |
| Most Powerful | 10AM (Wed 12th Aug) | 8ft (2.5m) 8s |
Table - best surf conditions forecast for Devonport Rivermouth over the next 16 days.
The Lowdown
Alright, this is Rusty, and I’ve got a look at what’s cooking for your local stretch.
Honestly, the next two weeks are a bit of a tough one for us. The whole 16-day window is pretty flat. There’s really only one little window that might get your hopes up, and even then, it’s for the more experienced crew. We’re looking at a long, quiet start and then some bigger, more powerful swell that’ll be a handful.
First up, the only real event on the calendar hits Devonport Rivermouth. This is your classic point/river setup, and it’s inconsistent, so when it does fire, you’ve got to be on it. The water temp is sitting at 54°F, which is about average for the time of year, so nothing wacky there.
The first proper surfable energy arrives on Monday, August 10th. The morning brings a 4ft swell from the NE, but it’s a short period, messy wind swell with a period of only 7 seconds. The combined energy is moderate at 251. The wind is a clean cross-off from the S, so the surface will be clean. The afternoon is similar, dropping to 4ft, still clean, but the conditions are very ordinary. It’s surfable, but just barely.
The real standout, and the only one that qualifies as a "must-check" for the brave, hits on Wednesday, August 12th. The morning brings a solid 8ft swell from the NW, with a period of 8 seconds. The combined energy jumps to a strong 886. That’s a lot of power. The wind is a clean cross-off from the W, so the surface will be clean. However, at 8ft, this is strictly for experts. The afternoon drops to 7ft, still with clean cross-off wind, but the energy is still high at 480. This is a full-on, heavy day.
Thursday, August 13th keeps some size, with 6ft in the morning and 5ft in the afternoon, both from the WNW/NW, but the period is short again at 7 seconds. The wind stays clean, but the quality is marginal. After that, the swell fades out fast. The rest of the window from Friday the 14th through to the 23rd is a ghost town of tiny, weak waves, most under 2ft, with a few glassy sessions that are flat. There’s a tiny spike of energy on the 23rd with 125, but it’s a 1ft swell, so nothing to write home about.
So, to sum it up: the first week is a write-off until the 10th, then a few days of ordinary, then a big, heavy pulse on the 12th for experts only. After that, it’s a long, flat grind. The 12th is the only true standout, but it’s a beast.
Rusty.
Short Range ForecastHeavy rain (total 47mm), heaviest during Sun night. Very mild (max 13°C on Tue morning, min 10°C on Sat afternoon). Wind will be generally light. | Days 5-7 Weather SummaryModerate rain (total 10mm), heaviest on Tue night. Very mild (max 13°C on Thu morning, min 7°C on Wed afternoon). Mainly fresh winds. | |||||||||||||||||||
Sat 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | Friday 14 | ||||||||||||||
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) | NW 16 | NW 14 | NE 5 | N 6 | NNE 7 | NE 7 | NE 9 | NE 10 | NW 14 | WNW 6 | NW 6 | NW 8 | NW 7 | WNW 7 | WNW 7 | NW 7 | NW 6 | NW 17 | NW 6 | NW 16 |
Wave Graph | ||||||||||||||||||||
39 | 33 | 35 | 60 | 257 | 135 | 190 | 76 | 32 | 49 | 224 | 875 | 418 | 203 | 282 | 168 | 49 | 98 | 93 | 39 | |
Wind (km/h) | ||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross | cross-on | on | cross-off | cross-off | cross-off | cross-off | cross | cross-on | cross-off | cross-off | cross-off | cross-off | cross-off | cross | cross-off | cross-off | cross-off |
High Tide | 6:35PM3.32m | 7:33AM3.18m | 7:30PM3.31m | 8:33AM3.16m | 8:30PM3.28m | 9:36AM3.14m | 9:34PM3.23m | 10:39AM3.12m | 10:41PM3.18m | 11:41AM3.12m | 11:48PM3.14m | 12:41PM3.13m | 00:53AM3.13m | |||||||
Low Tide | 1:05AM0.48m | 1:25PM1.09m | 2:01AM0.46m | 2:23PM1.13m | 3:01AM0.48m | 3:27PM1.16m | 4:05AM0.52m | 4:35PM1.15m | 5:11AM0.57m | 5:44PM1.09m | 6:18AM0.60m | 6:51PM0.99m | ||||||||
— | — | 7:13 | — | — | 7:11 | — | — | 7:11 | — | — | 7:09 | — | — | 7:07 | — | — | 7:07 | — | — | |
5:24 | — | — | 5:25 | — | — | 5:27 | — | — | 5:28 | — | — | 5:29 | — | — | 5:30 | — | — | 5:30 | — | |
mm | — | 2 | 3 | 5 | 24 | 5 | 8 | — | — | — | 5 | 2 | 2 | 1 | — | — | — | — | — | — |
Temp °C | 10 | 11 | 11 | 11 | 11 | 11 | 11 | 12 | 13 | 12 | 11 | 11 | 8 | 11 | 13 | 13 | 12 | 11 | 11 | 8 |
Feels °C | 8 | 8 | 9 | 9 | 7 | 7 | 10 | 8 | 8 | 7 | 5 | 6 | 1 | 5 | 8 | 8 | 8 | 5 | 7 | 4 |
Swell 1 Height (m) Direction Period (s) | NW 16 | NNW 5 | NNW 6 | NW 13 | NW 19 | NE 7 | NE 9 | NE 10 | NE 10 | NNE 10 | NE 10 | NW 17 | NW 19 | NW 17 | NW 14 | NW 16 | NW 13 | NW 17 | NW 16 | NW 16 |
39 | 9 | 22 | 7 | 54 | 135 | 190 | 76 | 15 | 10 | 4 | 11 | 58 | 46 | 68 | 88 | 27 | 98 | 93 | 39 | |
Swell 2 Height (m) Direction Period (s) | N 20 | NW 14 | NW 14 | NW 18 | — | NNW 6 | NW 18 | N 6 | NW 14 | NW 13 | — | — | NE 10 | NE 10 | N 10 | — | NW 16 | — | — | — |
7 | 33 | 8 | 12 | — | 26 | 48 | 16 | 32 | 7 | — | — | 4 | 4 | 2 | — | 41 | — | — | — | |
Swell 3 Height (m) Direction Period (s) | — | NW 18 | NW 18 | NW 18 | — | NW 19 | NNW 6 | NW 16 | — | — | — | — | — | — | — | — | — | — | — | — |
— | 13 | 13 | 12 | — | 90 | 6 | 40 | — | — | — | — | — | — | — | — | — | — | — | — | |
Wind waves Height (m) Direction Period (s) | NE 3 | NNE 4 | NE 5 | N 6 | NNE 7 | SSE 3 | SSE 3 | W 5 | WNW 6 | WNW 6 | NW 6 | NW 8 | NW 7 | WNW 7 | WNW 7 | NW 7 | NW 6 | NW 6 | NW 6 | WNW 5 |
1 | 11 | 35 | 60 | 257 | 3 | 2 | 11 | 55 | 49 | 224 | 875 | 418 | 203 | 282 | 168 | 49 | 72 | 83 | 33 | |
Nearest Offshore or Glassy | ||||||||||||||||||||
Distance (km) | 131 | 180 | 216 | 131 | 131 | 86 | 0 | 211 | 178 | 180 | 216 | 354 | 180 | 180 | 180 | 178 | 178 | 178 | 351 | 131 |
Best forecast wave conditions in North Coast of Tasmania | ||||||||||||||||||||
Best forecast wave conditions in Australia | ||||||||||||||||||||
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Information about the Devonport Rivermouth Surf forecast
The above surf forecast table for Devonport Rivermouth provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Devonport Rivermouth can be found by selecting the local surf guide option on the grey menu. Our Devonport Rivermouth 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 (Devonport Rivermouth) 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 Devonport Rivermouth 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.
Devonport Rivermouth is 5 km (3 miles) from Devonport. If you plan a holiday in North Coast of Tasmania, look for hotels and other accommodation in Devonport. Devonport has rooms for a wide range of budgets as well as car hire and transport links.











