Surf Forecasts:
Devonport Rivermouth surf forecast from 17 Aug 2026:
- Most powerful swell: Wednesday 19 Aug, 10PM (local time) - 6.5ft (2.0m), 7s period, NNW swell with 406 kJ wave energy.
Best Forecast Surf Conditions for Devonport Rivermouth this week:
The most powerful waves expected at Devonport Rivermouth in the next 16 days are 2.0m 7s and forecast to arrive on Wednesday (Aug 19) at 10PM. 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 Sunday (Aug 23) at 1AM.
| Wave Type | Time (AEST) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | - | - |
| Best Surf | - | - |
| Most Powerful | 10PM (Wed 19th Aug) | 6.5ft (2.0m) 7s |
Table - best surf conditions forecast for Devonport Rivermouth over the next 16 days.
The Lowdown
G’day, Rusty here, giving you the outlook in feet and miles. For the next sixteen days at Devonport Rivermouth, it’s a grim run. Mostly flat, with only tiny scraps of swell and ordinary conditions.
The first real chance is Thursday, August 20. Morning swell about 5ft from the NW with a cross-shore wind from the WNW at 12 mph. Combined energy moderate at 236. By the afternoon, the wind switches to W at 16 mph and turns cross-offshore. Swell drops to 5ft from the NW, and it cleans up but still poor.
Friday, August 21, is a down day: 3ft in the morning from the NW, weak energy at 86. Afternoon inches up to 4ft from the NW (136 energy) but stays cross-shore and choppy.
Saturday, August 22, is your best shot. Morning brings 4ft from the WNW and a fresh cross-offshore wind from the WSW at 19 mph. Waves are clean, combined energy 147. It’s not big, but it’s the cleanest you’ll get. Afternoon holds 3ft from the NW with cross-offshore wind at 16 mph. Still clean, still small. Crowds can be around sometimes, but on a day this average, you’ll have room.
From Sunday, August 23, onward, it’s a dead zone. Swell drops below 1ft, periods go long and weak, energy stays in the teens. The only exception is Wednesday, August 26. Morning brings 4ft from the NNW with a glassy light air from the WSW at 3 mph. It’s clean, but the conditions are very ordinary. That afternoon leaps to 6ft from the NNW (330 energy), but a cross-shore wind from the WNW at 12 mph ruins it.
After that, back to flat through the end of August and into September. A long, empty gap from August 23 to September 1 with barely a ripple. Beginners should avoid the bigger days like August 26 afternoon (over 5ft, blown out). Experts won’t find much over 8ft, so no real power. This spot is inconsistent and rarely breaks well, and this forecast proves it.
Water temp on August 20 morning is about 55°F, a tiny bit above average—nothing unusual.
Honestly, it’s a tough stretch. Saturday, August 22, is your standout for clean but small waves. Most other days look better for kite surfing when the wind picks up. Not much for paddle surfing here.
Rusty out.
Short Range ForecastHeavy rain (total 33mm), heaviest during Wed afternoon. Very mild (max 14°C on Tue morning, min 10°C on Thu afternoon). Mainly fresh winds. | Days 5-7 Weather SummarySome drizzle, heaviest during Fri afternoon. Very mild (max 13°C on Sat morning, min 8°C on Sat night). Mainly fresh winds. | ||||||||||||||||||
Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | Sunday 23 | ||||||||||||||
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 | NNE 6 | NNE 6 | NE 5 | NE 7 | NNE 6 | NNW 7 | NW 6 | NW 6 | NW 6 | WNW 5 | NW 5 | NW 6 | WNW 6 | NW 15 | NW 15 | NW 14 | NW 15 | NW 16 |
Wave Graph  | |||||||||||||||||||
 kJ | 38 | 53 | 63 | 55 | 85 | 201 | 289 | 177 | 231 | 85 | 34 | 33 | 100 | 128 | 83 | 35 | 33 | 36 | 38 |
Wind (km/h) | |||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross | cross | cross-on | cross | cross-on | on | cross | cross | cross-off | cross-off | cross | cross | cross | cross-off | cross-off | cross-off | cross | cross-off | cross-off |
High Tide | 3:46AM3.13m | 4:01PM3.21m | 4:34AM3.12m | 4:41PM3.20m | 5:17AM3.08m | 5:18PM3.18m | 5:58AM3.04m | 5:52PM3.15m | 6:36AM2.99m | 6:27PM3.10m | 7:14AM2.94m | 7:02PM3.04m | |||||||
Low Tide | 9:55AM0.82m | 10:21PM0.65m | 10:37AM0.91m | 11:02PM0.64m | 11:15AM1.01m | 11:40PM0.67m | 11:51AM1.11m | 00:16AM0.71m | 12:26PM1.19m | 00:51AM0.76m | 1:01PM1.27m | 1:27AM0.81m | |||||||
 |  |  |  |  |  |  | |  | |  | | | | | | | | | |
 | — | 7:01 | — | — | 7:00 | — | — | 6:58 | — | — | 6:56 | — | — | 6:56 | — | — | 6:54 | — | — |
 | — | — | 5:35 | — | — | 5:36 | — | — | 5:37 | — | — | 5:37 | — | — | 5:38 | — | — | 5:39 | — |
mm | — | — | — | — | 6 | 19 | 3 | — | 5 | — | — | 1 | — | — | — | — | — | — | — |
Temp °C | 12 | 14 | 14 | 12 | 12 | 13 | 13 | 13 | 11 | 11 | 12 | 11 | 12 | 13 | 12 | 10 | 13 | 13 | 11 |
Feels °C | 9 | 10 | 11 | 9 | 10 | 8 | 9 | 7 | 6 | 7 | 8 | 6 | 6 | 7 | 6 | 5 | 7 | 7 | 6 |
Swell 1 Height (m) Direction Period (s) | NW 16 | NNE 6 | NNW 14 | NW 14 | NE 7 | NW 15 | NE 6 | NE 6 | NE 7 | NW 12 | NW 12 | NW 14 | NW 17 | NW 16 | NW 15 | NW 15 | NW 14 | NW 15 | NW 16 |
| kJ | 38 | 53 | 20 | 7 | 85 | 9 | 45 | 5 | 7 | 47 | 21 | 33 | 100 | 86 | 83 | 35 | 33 | 33 | 38 |
Swell 2 Height (m) Direction Period (s) | — | NW 15 | — | — | NW 14 | — | NW 15 | NNE 7 | — | NE 7 | NW 16 | NW 19 | NE 6 | — | — | — | — | NW 18 | — |
| kJ | — | 33 | — | — | 7 | — | 8 | 5 | — | 2 | 10 | 14 | 2 | — | — | — | — | 12 | — |
Swell 3 Height (m) Direction Period (s) | — | — | — | — | — | — | — | NW 13 | — | — | NW 20 | NE 7 | — | — | — | — | — | — | — |
| kJ | — | — | — | — | — | — | — | 7 | — | — | 15 | 2 | — | — | — | — | — | — | — |
Wind waves Height (m) Direction Period (s) | NE 4 | — | NNE 6 | NE 5 | — | NNE 6 | NNW 7 | NW 6 | NW 6 | NW 6 | WNW 5 | NW 5 | NW 6 | WNW 6 | WNW 6 | WNW 5 | WNW 4 | NW 5 | WNW 5 |
| kJ | 19 | — | 63 | 55 | — | 201 | 289 | 177 | 231 | 85 | 34 | 33 | 88 | 128 | 59 | 20 | 11 | 36 | 24 |
Nearest Offshore or Glassy | |||||||||||||||||||
Distance (km) | 131 | 216 | 143 | 143 | 216 | 216 | 216 | 227 | 220 | 216 | 220 | 216 | 260 | 351 | 178 | 184 | 311 | 283 | 178 |
Best forecast wave conditions in North Coast of Tasmania | |||||||||||||||||||
Best forecast wave conditions in Australia | |||||||||||||||||||
Header Global | |||||||||||||||||||
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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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