Surf Forecasts:
Navarro Rivermouth surf forecast from 7 Sep 2026:
- Best quality surf: Thursday 10 Sep, 8AM (local time) - 3ft (0.9m), 17s period, SW swell with glassy winds.
- Most powerful swell: Saturday 12 Sep, 8PM (local time) - 8ft (2.5m), 8s period, NW swell with 769 kJ wave energy.
- Next surfable swell (1★+): Monday 7 Sep, 2AM (local time) - 5ft (1.6m), 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 Monday (Sep 07) at 2AM. The primary swell is predicted to be 1.6m and 6s period. The wind is predicted to be cross-offshore as the swell arrives.
The most powerful waves expected at Navarro Rivermouth in the next 16 days are 2.5m 8s and forecast to arrive on Saturday (Sep 12) at 8PM. Winds are predicted to be cross-onshore at the time the swell arrives. The largest open ocean swell (not directed at the beach) is 1.1m 12s period and expected on Tuesday (Sep 08) at 8PM.
| Wave Type | Time (PDT) & Date | Wave Height & Period |
|---|---|---|
| Next good surf (1 star+) | 2AM (Mon 7th Sep) | 5ft (1.6m) 6s |
| Best Surf | 8AM (Thu 10th Sep) | 3ft (0.9m) 17s |
| Most Powerful | 8PM (Sat 12th Sep) | 8ft (2.5m) 8s |
Table - best surf conditions forecast for Navarro Rivermouth over the next 16 days.
The Lowdown
Alrighty, let’s break it down in feet and miles per hour.
Right off the bat, I’ll be straight with you – the next few days are a write-off. We’re looking at Navarro Rivermouth, and the wind is just not playing ball. It’s a frustrating start to the run. That first real chance to paddle out doesn’t show up until Wednesday morning, the 9th of September. The swell is a tiny 3ft from the NW, but the wind goes glassy. The energy is weak though, only about 116. It’s surfable, but it’s very ordinary. You’d be scratching for a wave.
The real story here is the waiting game. For a solid week after that, from the 10th through the 17th, it’s mostly cross-onshore junk. The swell starts building – we’re talking 8ft to 12ft NW from the 12th onwards – but it’s messy. The combined energy gets huge, hitting 1754 on the 16th, but that’s the problem. The forecast says it’s predicted to be too big for this break. That 12ft on Wednesday the 16th afternoon is a monster, but it’s a straight-up expert-only zone with those cross-onshore winds. For a beginner to intermediate spot, that’s a no-go.
The pick of the bunch, if you can call it that, is the morning of the 17th of September. You’ve got an 8ft NW swell, period ticking up to 9 seconds, and the wind is *on* from the W at just 6 mph. The energy is massive at 1926, but it’s a marginal call. It’s big, it’s powerful, and it’s for experts only. Not a standout for the average surfer.
The second week is a bit of a mixed bag. The swell sticks around at 8ft from the NW on the 18th, but it’s still cross-on. The 19th drops back to 7ft, and the wind finally swings around, but it’s from the SW, which is still cross-on. The energy is still high, around 999. It’s a lot of juice for a mess. By the 20th, the swell collapses back to 3ft from the SW with a very long 18-second period, but the wind is up again. Honestly, it’s a tough two weeks. The river mouth is inconsistent at the best of times, and the wind is just ruining it for us.
Standout: There isn’t a true standout. If I had to force one, it’s the morning of the 17th of September for the big-wave crew only. For everyone else, keep your board in the car and check back later.
The water temperature is sitting at 58°F, which is only about 1°F cooler than normal for this time of year. Pretty average for the start of autumn.
Rusty.
Short Range ForecastMostly dry. Warm (max 21°C on Tue night, min 12°C on Sun morning). Wind will be generally light. | Days 4-6 Weather SummaryMostly dry. Warm (max 24°C on Wed morning, min 13°C on Fri night). Wind will be generally light. | ||||||||||||||||||||
Sunday 6 | Monday 7 | Tuesday 8 | Wednesday 9 | Thursday 10 | Friday 11 | Saturday 12 | |||||||||||||||
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 9 | NW 5 | NW 6 | NW 7 | NW 7 | NW 7 | NW 8 | NW 8 | NW 7 | NW 8 | SW 19 | NW 12 | NW 12 | SW 17 | SW 16 | NW 7 | SW 15 | NW 8 | NW 8 | NW 8 | NW 8 |
Wave Graph  | |||||||||||||||||||||
 kJ | 107 | 122 | 188 | 131 | 135 | 231 | 160 | 125 | 89 | 116 | 427 | 149 | 195 | 560 | 489 | 102 | 459 | 458 | 581 | 728 | 598 |
Wind (km/h) | |||||||||||||||||||||
Wind State on-shore cross-onshore cross-shore cross-offshore off-shore glassy | cross-on | cross-on | cross-off | on | cross-on | cross-off | cross-on | cross-on | glassy | glassy | cross-on | glassy | cross-on | cross-on | glassy | cross-on | cross-on | cross | cross-on | cross-on | cross |
High Tide | 9:11AM1.37m | 7:27PM1.87m | 9:55AM1.47m | 8:34PM1.91m | 10:33AM1.56m | 9:34PM1.94m | 11:08AM1.64m | 10:29PM1.91m | 11:41AM1.71m | 11:20PM1.85m | 12:12PM1.76m | 00:11AM1.74m | 12:42PM1.78m | 1:01AM1.62m | |||||||
Low Tide | 1:36PM0.98m | 2:50AM-0.12m | 2:42PM0.86m | 3:40AM-0.14m | 3:39PM0.71m | 4:24AM-0.12m | 4:29PM0.56m | 5:03AM-0.05m | 5:17PM0.42m | 5:40AM0.06m | 6:02PM0.30m | 6:16AM0.21m | 6:47PM0.22m | ||||||||
 | |  | | | |  | |  |  | | | | | | | | | | | | |
 | 6:47 | — | — | 6:48 | — | — | 6:48 | — | — | 6:50 | — | — | 6:50 | — | — | 6:52 | — | — | 6:52 | — | — |
 | — | 7:37 | — | — | 7:36 | — | — | 7:35 | — | — | 7:32 | — | — | 7:31 | — | — | 7:30 | — | — | 7:28 | — |
mm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
Temp °C | 15 | 16 | 15 | 16 | 16 | 16 | 19 | 17 | 21 | 24 | 24 | 23 | 21 | 19 | 15 | 16 | 16 | 14 | 15 | 16 | 15 |
Feels °C | 13 | 13 | 13 | 14 | 14 | 14 | 17 | 16 | 19 | 22 | 21 | 21 | 20 | 17 | 14 | 14 | 13 | 13 | 10 | 10 | 11 |
Swell 1 Height (m) Direction Period (s) | SSW 15 | SSW 15 | SSW 14 | NW 7 | NW 7 | NW 7 | NW 8 | NW 8 | NW 7 | NW 8 | NW 8 | NW 8 | SSW 17 | S 11 | SW 16 | SW 16 | SW 15 | SSW 15 | SW 14 | SW 14 | SW 14 |
| kJ | 405 | 405 | 264 | 131 | 135 | 231 | 160 | 125 | 89 | 116 | 119 | 99 | 504 | 251 | 489 | 558 | 459 | 372 | 305 | 301 | 203 |
Swell 2 Height (m) Direction Period (s) | NW 9 | SSE 15 | SSE 14 | SSE 13 | SSW 14 | S 13 | S 12 | S 12 | S 12 | S 11 | S 11 | NW 12 | NW 12 | SW 17 | S 10 | NW 7 | S 8 | NW 12 | WSW 13 | S 10 | SW 21 |
| kJ | 107 | 186 | 201 | 236 | 217 | 289 | 243 | 232 | 171 | 114 | 152 | 149 | 195 | 560 | 192 | 102 | 46 | 37 | 35 | 7 | 67 |
Swell 3 Height (m) Direction Period (s) | SSE 15 | SSW 11 | SW 10 | SSW 14 | SSE 13 | SSW 13 | SSW 13 | SSW 14 | S 14 | S 13 | SW 19 | S 10 | NW 7 | NW 7 | NW 7 | SSW 8 | WNW 10 | SSW 7 | NW 11 | WSW 18 | WSW 12 |
| kJ | 125 | 64 | 25 | 233 | 178 | 116 | 120 | 173 | 132 | 115 | 427 | 102 | 65 | 64 | 89 | 73 | 63 | 10 | 31 | 31 | 14 |
Wind waves Height (m) Direction Period (s) | NW 5 | NW 5 | NW 6 | — | — | — | — | — | — | — | — | — | — | — | — | — | NW 8 | NW 8 | NW 8 | NW 8 | NW 8 |
| kJ | 32 | 122 | 188 | — | — | — | — | — | — | — | — | — | — | — | — | — | 264 | 458 | 581 | 728 | 598 |
Nearest Offshore or Glassy | |||||||||||||||||||||
Distance (km) | 116 | 293 | 0 | 41 | 95 | 0 | 13 | 13 | 0 | 0 | 33 | 0 | 147 | 72 | 0 | 290 | 95 | 13 | 291 | 291 | 13 |
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.
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