Surf Forecasts:
Devonport Rivermouth surf forecast from 7 Aug 2026:
- Best quality surf: Monday 10 Aug, 1PM (local time) - 3.5ft (1.1m), 8s period, NE swell with cross-offshore winds.
- Most powerful swell: Wednesday 12 Aug, 1PM (local time) - 8ft (2.5m), 8s period, NW swell with 836 kJ wave energy.
- Next surfable swell (1★+): Monday 10 Aug, 7AM (local time) - 3.5ft (1.1m), 6s period with NE 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 1.1m and 6s period with a secondary swell of 0.8m 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 1PM. 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 5s period and expected on Tuesday (Aug 11) at 4AM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 7AM (Mon 10th Aug) | 3.5ft (1.1m) 6s |
| Best Surf | 1PM (Mon 10th Aug) | 3.5ft (1.1m) 8s |
| Most Powerful | 1PM (Wed 12th Aug) | 8ft (2.5m) 8s |
Table - best surf conditions forecast for Devonport Rivermouth over the next 16 days.
The Lowdown
Right from the get-go, this forecast window is pretty bleak. Honestly, the next two weeks look like a real grind for anyone chasing waves. For the next week and a half, it’s all flat, onshore slop, or tiny dribble. The swell just isn’t there.
Let’s break it down. The only real blip on the radar is this coming Tuesday and Wednesday, August 12th and 13th. It’s not perfect, but it’s the only stretch that lights up. The water temp is about average for this time of year, so it’s going to be a little cool regardless.
Devonport Rivermouth – the spot’s on a point/river setup, so it likes a northwest swell, which is what we’re looking at. There’s a pulse for the Tuesday morning. We’ve got an 8ft NW swell with a cross-off wind. The combined energy is strong (693). It’s going to be big and clean, but it’s a tricky one. The period is only 8 seconds, so it’s not a true groundswell, and it’ll be walled up. It’s a beginner spot, and this is way too much for beginners. For the experienced crew, the Wednesday morning is the better call, with 5ft dropping to 5ft in the afternoon. The wind is cross-off, so it’ll be clean. Energy is moderate (299 and 295). It’s still short-period, but it’s the best of it. The crowds are only sometimes an issue here, which helps. This Wednesday morning is your standout.
Beyond that, it’s grim. The energy drops off back to nothing for Thursday and Friday. And then we have a run of no-surf days from the 14th right through to the 22nd. A long, flat, boring spell. Then on the 22nd, there’s a bit of a tease. The morning is glassy with a 4ft N swell, but the period is 5 seconds and the energy is weak (101). It’ll be a bit of a mushburger. The afternoon picks up to 8ft but with a cross wind and a 7-second period, making it messy.
To be honest, if you’re not frothing on the Wednesday morning, it’s a good time to do some maintenance on your boards. The river mouth might look interesting for a kite if the wind is right on the bigger days, but even that is a stretch.
Rusty.
Short Range ForecastHeavy rain (total 65mm), heaviest during Mon morning. Very mild (max 12°C on Sun night, min 5°C on Fri night). Wind will be generally light. | Days 5-7 Weather SummaryModerate rain (total 12mm), heaviest on Tue night. Very mild (max 14°C on Thu morning, min 7°C on Wed night). Mainly fresh winds. | ||||||||||||||||||
Saturday 8 | Sunday 9 | Monday 10 | Tuesday 11 | Wednesday 12 | Thursday 13 | ||||||||||||||
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 18 | NW 16 | NW 16 | NW 14 | NW 6 | NNW 6 | NNE 6 | NNE 6 | NE 9 | NNE 10 | NW 14 | NW 13 | NW 6 | NW 8 | NW 8 | WNW 8 | WNW 7 | NW 7 | NW 6 |
Wave Graph  | |||||||||||||||||||
 kJ | 48 | 40 | 39 | 33 | 37 | 68 | 141 | 145 | 166 | 64 | 31 | 27 | 269 | 681 | 539 | 270 | 186 | 163 | 109 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-off | cross | 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-off |
High Tide | 6:34AM3.18m | 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 | |||||||
Low Tide | 00:11AM0.54m | 12:30PM1.04m | 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 | |||||||
 |  | |  |  |  |  | |  |  | |  |  |  | |  | | |  | |
 | — | 7:15 | — | — | 7:13 | — | — | 7:11 | — | — | 7:11 | — | — | 7:09 | — | — | 7:07 | — | — |
 | — | — | 5:24 | — | — | 5:25 | — | — | 5:27 | — | — | 5:28 | — | — | 5:29 | — | — | 5:30 | — |
mm | — | — | — | 3 | 4 | 12 | 20 | 20 | 6 | 1 | — | 1 | 9 | — | 1 | — | — | — | — |
Temp °C | 7 | 11 | 11 | 11 | 11 | 10 | 12 | 11 | 11 | 11 | 12 | 11 | 11 | 11 | 9 | 12 | 14 | 14 | 12 |
Feels °C | 4 | 9 | 9 | 10 | 8 | 6 | 9 | 9 | 9 | 7 | 7 | 6 | 5 | 4 | 2 | 7 | 10 | 10 | 8 |
Swell 1 Height (m) Direction Period (s) | NW 4 | NW 16 | NW 16 | N 5 | NW 6 | NNW 6 | NNE 6 | SE 3 | NE 9 | NW 6 | NE 10 | NE 10 | NE 10 | NW 17 | NNW 20 | NW 18 | NW 13 | NW 14 | NW 14 |
| kJ | 4 | 40 | 39 | 24 | 37 | 68 | 141 | 2 | 166 | 31 | 25 | 15 | 4 | 12 | 37 | 50 | 113 | 132 | 73 |
Swell 2 Height (m) Direction Period (s) | NW 17 | — | — | NW 14 | NW 14 | NW 13 | NNW 7 | NW 19 | NNW 6 | NNE 10 | NW 14 | NW 13 | NW 18 | — | NE 10 | N 10 | — | — | — |
| kJ | 46 | — | — | 33 | 8 | 7 | 66 | 90 | 71 | 64 | 31 | 27 | 12 | — | 4 | 2 | — | — | — |
Swell 3 Height (m) Direction Period (s) | NW 18 | — | N 20 | NW 18 | NW 18 | NW 18 | NW 19 | SSE 3 | NW 18 | NW 16 | — | — | — | — | — | — | — | — | — |
| kJ | 48 | — | 7 | 13 | 12 | 12 | 54 | 2 | 48 | 40 | — | — | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | — | — | — | NE 4 | NNE 5 | NE 4 | — | NNE 6 | — | — | W 5 | WNW 4 | NW 6 | NW 8 | NW 8 | WNW 8 | WNW 7 | NW 7 | NW 6 |
| kJ | — | — | — | 3 | 25 | 18 | — | 145 | — | — | 33 | 13 | 269 | 681 | 539 | 270 | 186 | 163 | 109 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 0 | 131 | 131 | 216 | 216 | 216 | 131 | 0 | 0 | 184 | 180 | 180 | 216 | 180 | 180 | 180 | 184 | 184 | 184 |
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.
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