Surf Forecasts:
Navarro Rivermouth surf forecast from 16 Aug 2026:
- Best quality surf: Tuesday 18 Aug, 8PM (local time) - 6ft (1.8m), 7s period, NW swell with glassy winds.
- Most powerful swell: Wednesday 19 Aug, 11AM (local time) - 6.5ft (2.0m), 8s period, NW swell with 482 kJ wave energy.
- Next surfable swell (1★+): Sunday 16 Aug, 11PM (local time) - 4.5ft (1.3m), 6s period with NW swell.
Best Forecast Surf Conditions for Navarro Rivermouth this week:
The surf forecast for Navarro Rivermouth over the next 16 days: The first swell (rated 1 star or higher) is forecast to arrive on Sunday (Aug 16) at 11PM. The primary swell is predicted to be 1.3m and 6s period. The wind is predicted to be glassy as the swell arrives.
The most powerful waves expected at Navarro Rivermouth in the next 16 days are 2.0m 8s and forecast to arrive on Wednesday (Aug 19) at 11AM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.0m 16s period and expected on Sunday (Aug 16) at 5PM.
| Wave Type | Time (PDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 11PM (Sun 16th Aug) | 4.5ft (1.3m) 6s |
| Best Surf | 8PM (Tue 18th Aug) | 6ft (1.8m) 7s |
| Most Powerful | 11AM (Wed 19th Aug) | 6.5ft (2.0m) 8s |
Table - best surf conditions forecast for Navarro Rivermouth over the next 16 days.
The Lowdown
Alright folks, it’s Rusty here, and I gotta be straight with you – the next couple of weeks at the rivermouth look pretty tough. We’ve got a long stretch of messy, onshore wind conditions messing up what could be decent swell. Let’s not sugarcoat it.
We’re kicking off with a blank. Nothing worth paddling out for through the weekend and into the start of next week. The first real chance to even think about a wave is on Wednesday, August 19, but even that’s a struggle. The morning sees swell bumping up to 7 ft from the NW, with a short period of 8 seconds and moderate combined energy (670), but it’s coming in under a gentle cross-onshore breeze (15 km/h). That’s gonna make it choppy and pretty average. The afternoon doesn't get any better – stronger cross-onshore winds and a score that keeps it in the "don't bother" category. That kind of size and short period just isn’t gonna hold up.
Things actually get interesting on Sunday, August 23 morning. We get a pulse of very long-period SW groundswell at 19 seconds, with a solid 452 combined energy, but the height is only 2 ft. That’s a tease. A long-period, clean-looking swell from the optimum direction for this spot, but it’s just too small to do much with. The afternoon gets a better bite of swell though – 6 ft from the NW at 9 seconds and combined energy jumping to 547. The wind flips to a light WSW at just 5 km/h, nearly glassy. That afternoon window on the 23rd is the lone standout: clean conditions, a bit of punch, and that long-period groundswell energy in the mix makes for the best potential of the whole outlook. It’s not going to be perfect, but for this stretch, it’s the only session that feels worth the wetsuit.
After that, we go right back into the grinder. A week of weak, onshore, short-period junk. Small swells, constant cross-onshore winds, and energy readings that barely get into the moderate range. Another pulse of long-period SW energy pops up on the 26th, but it’s still tiny. The water temp is sitting at 55 °F, which is 3 °F colder than average for the time of year, so expect a bit of a chill if you do get in.
Overall, Navarro Rivermouth is a river break that rarely fires under these conditions. The lack of clean, offshore wind is a killer. Don’t hold your breath for the first week – the one bright spot is that Sunday afternoon session on August 23, and that’s it. After that, it’s a lot of windy, short-period slop.
Stay patient, and keep an eye on the forecast. It tends not to stay this poor forever.
Rusty.
Short Range ForecastMostly dry. Very mild (max 14°C on Sun morning, min 11°C on Mon night). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Very mild (max 15°C on Thu morning, min 11°C on Wed night). Wind will be generally light. | ||||||||||||||||||||
Sunday 16 | Monday 17 | Tuesday 18 | Wednesday 19 | Thursday 20 | Friday 21 | Saturday 22 | |||||||||||||||
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) | NW 6 | NW 6 | NW 7 | NW 7 | NW 7 | NW 7 | NW 7 | NW 7 | NW 7 | NW 8 | NW 8 | NW 7 | WNW 12 | WNW 11 | NW 7 | NW 7 | NW 7 | NW 6 | NW 6 | NW 6 | NW 7 |
Wave Graph | |||||||||||||||||||||
42 | 40 | 124 | 99 | 119 | 262 | 262 | 327 | 344 | 482 | 446 | 317 | 193 | 173 | 322 | 200 | 226 | 177 | 124 | 182 | 178 | |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | on | cross-on | glassy | on | cross-on | cross | cross-on | cross-on | cross | cross-on | cross-on | cross | cross-on | cross-on | cross-on | cross-on | cross-on | glassy | cross-on | cross-on | glassy |
High Tide | 2:40PM1.75m | 2:55AM1.41m | 3:15PM1.74m | 4:03AM1.25m | 3:52PM1.71m | 5:32AM1.14m | 4:36PM1.68m | 7:21AM1.13m | 5:28PM1.65m | 8:50AM1.20m | 6:27PM1.65m | 9:45AM1.27m | 7:27PM1.67m | ||||||||
Low Tide | 8:06AM0.26m | 8:54PM0.38m | 8:44AM0.47m | 9:52PM0.35m | 9:27AM0.67m | 10:55PM0.32m | 10:17AM0.85m | 00:03AM0.29m | 11:25AM0.99m | 1:12AM0.24m | 12:44PM1.05m | 2:13AM0.18m | 1:54PM1.05m | 3:04AM0.11m | |||||||
6:28 | — | — | 6:28 | — | — | 6:30 | — | — | 6:31 | — | — | 6:31 | — | — | 6:33 | — | — | 6:33 | — | — | |
— | 8:08 | — | — | 8:07 | — | — | 8:06 | — | — | 8:05 | — | — | 8:02 | — | — | 8:01 | — | — | 8:00 | — | |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 14 | 14 | 13 | 14 | 14 | 11 | 13 | 13 | 12 | 14 | 14 | 13 | 15 | 14 | 12 | 14 | 14 | 13 | 13 | 14 | 13 |
Feels °C | 13 | 13 | 13 | 12 | 12 | 9 | 11 | 10 | 12 | 12 | 11 | 11 | 13 | 11 | 10 | 12 | 11 | 11 | 11 | 11 | 11 |
Swell 1 Height (m) Direction Period (s) | SSW 16 | SSW 16 | NW 7 | NW 7 | NW 7 | NW 7 | SSW 15 | SSW 16 | SSW 16 | SSW 15 | SSW 15 | WNW 12 | NW 6 | WNW 11 | NW 7 | WNW 11 | WNW 10 | WNW 10 | SSW 13 | SSW 13 | NW 7 |
612 | 463 | 124 | 99 | 119 | 262 | 242 | 353 | 291 | 305 | 309 | 196 | 130 | 173 | 218 | 117 | 86 | 58 | 99 | 67 | 178 | |
Swell 2 Height (m) Direction Period (s) | NW 6 | NW 6 | SSW 15 | SSW 15 | SSW 15 | SSW 15 | SSW 18 | WNW 15 | WNW 13 | WNW 12 | WNW 12 | SSW 15 | WNW 12 | SSW 14 | WNW 11 | SSW 14 | SSW 13 | SSW 13 | WNW 10 | SW 18 | SSW 12 |
42 | 40 | 405 | 334 | 334 | 272 | 63 | 84 | 102 | 172 | 210 | 318 | 193 | 226 | 164 | 156 | 101 | 99 | 33 | 78 | 50 | |
Swell 3 Height (m) Direction Period (s) | WNW 10 | WNW 9 | W 8 | W 9 | W 9 | SSW 18 | WNW 16 | NW 11 | SSW 13 | SW 20 | SW 21 | W 21 | SSW 14 | SW 19 | SSW 14 | SW 18 | SW 18 | SW 18 | SSW 16 | WNW 10 | SSW 16 |
32 | 29 | 37 | 41 | 39 | 62 | 25 | 5 | 65 | 16 | 18 | 9 | 223 | 58 | 236 | 51 | 80 | 48 | 53 | 19 | 81 | |
Wind waves Height (m) Direction Period (s) | — | — | — | — | — | — | NW 7 | NW 7 | NW 7 | NW 8 | NW 8 | NW 7 | — | NW 6 | NW 7 | NW 7 | NW 7 | NW 6 | NW 6 | NW 6 | — |
— | — | — | — | — | — | 262 | 327 | 344 | 482 | 446 | 317 | — | 145 | 322 | 200 | 226 | 177 | 124 | 182 | — | |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 73 | 95 | 0 | 190 | 294 | 13 | 190 | 52 | 13 | 190 | 95 | 13 | 116 | 290 | 13 | 290 | 290 | 0 | 190 | 291 | 0 |
Best forecast wave conditions in Mendocino County | |||||||||||||||||||||
Best forecast wave conditions in United States | |||||||||||||||||||||
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Information about the Navarro Rivermouth Surf forecast
The above surf forecast table for Navarro Rivermouth provides essential information for determining whether the surfing conditions will be good over the next 16 days. A general guide to surfing at Navarro Rivermouth can be found by selecting the local surf guide option on the grey menu. Our Navarro 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 (Navarro 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 Navarro 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.
Navarro Rivermouth is 48 km (30 miles) from Ukiah. If you plan a vacation in Mendocino County, look for hotels and other accommodation in Ukiah. Ukiah has rooms for a wide range of budgets as well as car hire and transport links.











