| Sat 05/18 | 12am | 2-3ft | | | 2.5ft | 10s | 279.49° | 2ft | 4s | | | 8 10 mph | | Brief Showers | 48°f | 100% |
| | 3am | 2-3ft | | | 2ft | 10s | 279.02° | 1.8ft | 4s | | | 5 6 mph | | Mostly Clear | 48°f | 100% |
| Sat 05/18 | 6am | 2-3ft | | | 2ft | 10s | 278.47° | 1.5ft | 4s | | | 6 7 mph | | Sunny | 48°f | 100% |
| | 9am | 2-3ft | | | 2ft | 10s | 278.34° | 1.4ft | 4s | | | 8 9 mph | | Fair | 52°f | 100% |
| | Noon | 2-3ft | | | 2ft | 10s | 278.64° | 1.6ft | 3s | | | 13 15 mph | | Sunny | 54°f | 100% |
| | 3pm | 2-3ft | | | 2ft | 10s | 278.95° | 1.7ft | 4s | | 0.2ft | 16s | | 13 16 mph | | Sunny | 52°f | 100% |
| | 6pm | 2-3ft | | | 2ft | 10s | 279.25° | 1.6ft | 4s | | 0.3ft | 16s | | 10 13 mph | | Sunny | 52°f | 100% |
| | 9pm | 2-3ft | | | 2.5ft | 9s | 282.99° | 0.4ft | 15s | | 0.9ft | 4s | | 6 9 mph | | Mostly Clear | 48°f | 100% |
| Low | 5:19AM | 7.6ft | | High | 11:25AM | 17.1ft | | Low | 5:44PM | 8ft | | High | 11:52PM | 17.6ft | | First Light | 4:45AM | | Sunrise | 5:26AM | | Sunset | 9:08PM | | Last Light | 9:48PM | |
| Sun 05/19 | 12am | 2-3ft | | | 1.8ft | 9s | 279.72° | 1.8ft | 4s | | 0.7ft | 4s | | 5 7 mph | | Mostly Clear | 48°f | 100% |
| | 3am | 1-2ft | | | 1.5ft | 9s | 279.45° | 2ft | 5s | | | 6 9 mph | | Cloudy | 48°f | 100% |
| Sun 05/19 | 6am | 2-4ft | | | 3ft | 8s | 279.15° | 1ft | 11s | | | 3 4 mph | | Cloudy | 50°f | 100% |
| | 9am | 2-4ft | | | 3.5ft | 8s | 278.93° | 0.8ft | 14s | | | 2 2 mph | | Overcast | 52°f | 100% |
| | Noon | 2-4ft | | | 3ft | 8s | 279.37° | 1ft | 13s | | | 5 5 mph | | Overcast | 55°f | 100% |
| | 3pm | 2-4ft | | | 3ft | 9s | 279.8° | 1ft | 13s | | | 8 9 mph | | Overcast | 54°f | 100% |
| | 6pm | 2-4ft | | | 3ft | 10s | 280.42° | 1ft | 13s | | 0.3ft | 4s | | 8 11 mph | | Drizzle | 54°f | 100% |
| | 9pm | 2-4ft | | | 3ft | 10s | 280.94° | 0.8ft | 13s | | 0.2ft | 4s | | 9 13 mph | | Mostly Clear | 50°f | 100% |
| Low | 6:29AM | 7.7ft | | High | 12:38PM | 17.1ft | | Low | 6:58PM | 7.9ft | | First Light | 4:44AM | | Sunrise | 5:25AM | | Sunset | 9:09PM | | Last Light | 9:50PM | |
| Mon 05/20 | 12am | 2-3ft | | | 2.5ft | 10s | 276.07° | 1ft | 12s | | 1.3ft | 3s | | 10 17 mph | | Mostly Clear | 50°f | 100% |
| | 3am | 3-4ft | | | 3ft | 11s | 287.14° | 1ft | 12s | | | 10 17 mph | | Mostly Clear | 50°f | 100% |
| Mon 05/20 | 6am | 3-4ft | | | 3ft | 11s | 288.02° | 0.9ft | 12s | | 0.2ft | 14s | | 11 20 mph | | Fair | 50°f | 100% |
| | 9am | 2-4ft | | | 3ft | 10s | 290.41° | 0.9ft | 12s | | 0.2ft | 14s | | 13 19 mph | | Fair | 54°f | 100% |
| | Noon | 2-4ft | | | 2.5ft | 11s | 274.87° | 1.9ft | 4s | | 0.2ft | 14s | | 16 22 mph | | Fair | 55°f | 100% |
| | 3pm | 2-3ft | | | 1.9ft | 11s | 276.03° | 2.5ft | 4s | | 0.2ft | 14s | | 17 24 mph | | Sunny | 55°f | 100% |
| | 6pm | 2-3ft | | | 1.9ft | 11s | 276.12° | 2.5ft | 4s | | 0.2ft | 14s | | 14 23 mph | | Sunny | 55°f | 100% |
| | 9pm | 2-3ft | | | 1.9ft | 11s | 276.08° | 1.4ft | 5s | | 1.9ft | 4s | | 13 25 mph | | Clear | 52°f | 100% |
| High | 1:07AM | 17.8ft | | Low | 7:44AM | 7.2ft | | High | 1:51PM | 17.7ft | | Low | 8:12PM | 7.2ft | | First Light | 4:43AM | | Sunrise | 5:24AM | | Sunset | 9:10PM | | Last Light | 9:52PM | |
| Tue 05/21 | 12am | 2-3ft | | | 2ft | 11s | 274.67° | 2ft | 4s | | 0.2ft | 15s | | 14 28 mph | | Clear | 52°f | 100% |
| | 3am | 2-3ft | | | 2ft | 11s | 275.03° | 2.5ft | 4s | | 0.3ft | 14s | | 15 28 mph | | Clear | 50°f | 100% |
| Tue 05/21 | 6am | 2-3ft | | | 2ft | 10s | 275.83° | 3ft | 5s | | 0.4ft | 14s | | 16 23 mph | | Fair | 50°f | 72% |
| | 9am | 2-3ft | | | 1.7ft | 10s | 277.73° | 3.5ft | 5s | | 1.5ft | 6s | | 15 19 mph | | Overcast | 52°f | 72% |
| | Noon | 2-3ft | | | 1.8ft | 10s | 277.23° | 4ft | 5s | | 1.3ft | 6s | | 13 16 mph | | Overcast | 54°f | 55% |
| | 3pm | 2-3ft | | | 1.8ft | 10s | 277.01° | 4.5ft | 5s | | 0.6ft | 13s | | 14 19 mph | | Fair | 57°f | 55% |
| | 6pm | 2-3ft | | | 1.8ft | 10s | 276.96° | 4.5ft | 6s | | 0.6ft | 13s | | 16 25 mph | | Fair | 55°f | 81% |
| | 9pm | 2-3ft | | | 1.8ft | 10s | 277.05° | 4.5ft | 6s | | 0.6ft | 13s | | 14 27 mph | | Mostly Clear | 52°f | 81% |
| High | 2:17AM | 18.7ft | | Low | 8:51AM | 6.2ft | | High | 2:54PM | 19ft | | Low | 9:15PM | 6ft | | First Light | 4:41AM | | Sunrise | 5:23AM | | Sunset | 9:12PM | | Last Light | 9:53PM | |
| Wed 05/22 | 12am | 2-3ft | | | 1.8ft | 10s | 276.5° | 4.5ft | 6s | | 0.5ft | 13s | | 13 21 mph | | Mostly Clear | 50°f | 60% |
| | 3am | 2-3ft | | | 1.8ft | 10s | 275.96° | 4ft | 6s | | 0.5ft | 12s | | 11 16 mph | | Clear | 48°f | 60% |
| Wed 05/22 | 6am | 2-3ft | | | 1.7ft | 10s | 275.58° | 4ft | 6s | | 0.4ft | 12s | | 12 17 mph | | Sunny | 46°f | 100% |
| | 9am | 2-3ft | | | 1.7ft | 10s | 275.54° | 3.5ft | 5s | | 0.3ft | 12s | | 12 16 mph | | Fair | 54°f | 100% |
| | Noon | 2-3ft | | | 1.8ft | 10s | 275.81° | 3ft | 5s | | 0.2ft | 12s | | 14 18 mph | | Sunny | 57°f | 95% |
| | 3pm | 2-3ft | | | 1.8ft | 10s | 276° | 3ft | 5s | | | 16 20 mph | | Sunny | 57°f | 95% |
| | 6pm | 2-3ft | | | 1.8ft | 10s | 275.44° | 2.5ft | 5s | | | 15 23 mph | | Sunny | 55°f | 90% |
| | 9pm | 2-3ft | | | 1.8ft | 10s | 274.84° | 2ft | 4s | | | 13 24 mph | | Clear | 52°f | 90% |
| High | 3:17AM | 19.9ft | | Low | 9:48AM | 5ft | | High | 3:48PM | 20.4ft | | Low | 10:10PM | 4.6ft | | First Light | 4:40AM | | Sunrise | 5:21AM | | Sunset | 9:13PM | | Last Light | 9:55PM | |
| Thu 05/23 | 12am | 2-3ft | | | 1.8ft | 10s | 274.36° | 2.5ft | 4s | | | 12 19 mph | | Clear | 52°f | 95% |
| | 3am | 2-3ft | | | 1.9ft | 10s | 273.87° | 2.5ft | 4s | | | 13 21 mph | | Mostly Clear | 52°f | 95% |
| Thu 05/23 | 6am | 2-3ft | | | 1.9ft | 10s | 273.88° | 3.5ft | 5s | | | 15 26 mph | | Fair | 48°f | 100% |
| | 9am | 2-3ft | | | 1.9ft | 10s | 274.25° | 5ft | 5s | | | 18 25 mph | | Sunny | 52°f | 100% |
| | Noon | 2-3ft | | | 5.5ft | 6s | 354.35° | 1.9ft | 10s | | | 18 23 mph | | Sunny | 54°f | 60% |
| | 3pm | 2-3ft | | | 6.5ft | 6s | 355.73° | 2ft | 10s | | | 20 25 mph | | Sunny | 54°f | 60% |
| | 6pm | 2-4ft | | | 6.5ft | 7s | 358.91° | 2ft | 10s | | | 19 27 mph | | Sunny | 54°f | 39% |
| | 9pm | 2-3ft | | | 5.5ft | 7s | 0.23000000000002° | 1.9ft | 10s | | | 16 28 mph | | Clear | 50°f | 39% |
| High | 4:09AM | 21.2ft | | Low | 10:38AM | 3.8ft | | High | 4:37PM | 21.8ft | | Low | 11:01PM | 3.4ft | | First Light | 4:38AM | | Sunrise | 5:20AM | | Sunset | 9:14PM | | Last Light | 9:56PM | |
| Fri 05/24 | 12am | 2-3ft | | | 1.9ft | 10s | 275.27° | 4.5ft | 6s | | | 14 23 mph | | Clear | 48°f | 42% |
| | 3am | 2-3ft | | | 1.9ft | 9s | 275.21° | 4ft | 5s | | | 12 17 mph | | Clear | 48°f | 42% |
| Fri 05/24 | 6am | 2-3ft | | | 1.9ft | 9s | 274.86° | 4ft | 6s | | | 8 10 mph | | Fair | 50°f | 49% |
| | 9am | 2-3ft | | | 1.8ft | 9s | 274.78° | 4ft | 6s | | | 7 8 mph | | Fair | 54°f | 49% |
| | Noon | 2-3ft | | | 1.8ft | 9s | 274.94° | 4ft | 6s | | | 11 11 mph | | Fair | 54°f | 36% |
| | 3pm | 2-3ft | | | 1.8ft | 9s | 275.2° | 4ft | 5s | | | 14 17 mph | | Sunny | 54°f | 36% |
| | 6pm | 2ft | | | 1.7ft | 9s | 274.46° | 3.5ft | 5s | | 0.2ft | 13s | | 13 19 mph | | Sunny | 52°f | 39% |
| | 9pm | 2ft | | | 1.7ft | 9s | 273.95° | 3ft | 5s | | | 10 17 mph | | Clear | 50°f | 39% |
| High | 4:59AM | 22.4ft | | Low | 11:26AM | 2.8ft | | High | 5:24PM | 23ft | | Low | 11:50PM | 2.4ft | | First Light | 4:37AM | | Sunrise | 5:19AM | | Sunset | 9:16PM | | Last Light | 9:58PM | |
| Sat 05/25 | 12am | 2ft | | | 1.7ft | 9s | 273.84° | 1.4ft | 4s | | 1.9ft | 5s | | 10 15 mph | | Clear | 50°f | 33% |
| | 3am | 2ft | | | 1.7ft | 9s | 273.52° | 2ft | 5s | | | 10 16 mph | | Clear | 50°f | 33% |
| Sat 05/25 | 6am | 2ft | | | 1.7ft | 9s | 273.41° | 2ft | 4s | | | 8 12 mph | | Sunny | 50°f | 30% |
| | 9am | 2ft | | | 1.7ft | 9s | 273.18° | 2.5ft | 4s | | | 8 12 mph | | Sunny | 57°f | 30% |
| | Noon | 1-2ft | | | 1.6ft | 9s | 273.06° | 3ft | 4s | | | 11 14 mph | | Sunny | 59°f | 28% |
| | 3pm | 1-2ft | | | 1.6ft | 9s | 272.86° | 3ft | 5s | | | 13 16 mph | | Sunny | 57°f | 28% |
| | 6pm | 1-2ft | | | 1.5ft | 9s | 272.42° | 3ft | 4s | | | 12 18 mph | | Sunny | 55°f | 21% |
| | 9pm | 1-2ft | | | 1.5ft | 9s | 272.25° | 3ft | 4s | | | 10 17 mph | | Clear | 54°f | 21% |
| High | 5:47AM | 23.2ft | | Low | 12:14PM | 2.2ft | | High | 6:12PM | 23.8ft | | First Light | 4:36AM | | Sunrise | 5:18AM | | Sunset | 9:17PM | | Last Light | 9:59PM | |
| Extended Surf Forecast for Porthtowan Area |
| Sun 05/26 | 12am | 2ft | | | 1.8ft | 8s | 272.34° | 1.2ft | 3s | | 0.2ft | 16s | | 11 20 mph | | Clear | 50°f | 28% |
| | 3am | 1-2ft | | | 1.7ft | 8s | 272.34° | 1.3ft | 3s | | | 8 11 mph | | Clear | 50°f | 28% |
| Sun 05/26 | 6am | 1-2ft | | | 1.6ft | 8s | 271.76° | 1.3ft | 3s | | | 7 10 mph | | Sunny | 50°f | 39% |
| | 9am | 1-2ft | | | 1.5ft | 8s | 271.76° | 1.4ft | 3s | | | 7 10 mph | | Sunny | 55°f | 39% |
| | Noon | 1-2ft | | | 1.4ft | 8s | 271.76° | 1.6ft | 4s | | | 10 12 mph | | Sunny | 55°f | 35% |
| | 3pm | 1-2ft | | | 1.3ft | 8s | 271.76° | 1.9ft | 4s | | | 8 10 mph | | Sunny | 57°f | 35% |
| | 6pm | 1-2ft | | | 1.3ft | 8s | 271.76° | 2.5ft | 4s | | 0.2ft | 12s | | 8 10 mph | | Sunny | 57°f | 26% |
| | 9pm | 1-2ft | | | 1.2ft | 8s | 271.76° | 2.5ft | 4s | | 0.3ft | 12s | | 15 24 mph | | Clear | 52°f | 26% |
| Low | 12:38AM | 1.7ft | | High | 6:35AM | 23.6ft | | Low | 1:01PM | 1.9ft | | High | 6:59PM | 24.2ft | | First Light | 4:35AM | | Sunrise | 5:17AM | | Sunset | 9:18PM | | Last Light | 10:01PM | |
| Mon 05/27 | 12am | 1-2ft | | | 1.1ft | 8s | 272.34° | 2ft | 4s | | 0.3ft | 12s | | 8 9 mph | | Mostly Clear | 50°f | 25% |
| | 3am | 1-2ft | | | 1.1ft | 7s | 272.91° | 1.7ft | 4s | | 0.7ft | 3s | | 8 9 mph | | Mostly Clear | 50°f | 25% |
| Mon 05/27 | 6am | 1ft | | | 1ft | 7s | 272.91° | 1.4ft | 4s | | 0.8ft | 3s | | 8 9 mph | | Fair | 50°f | 25% |
| | 9am | 1ft | | | 1ft | 7s | 272.91° | 0.4ft | 14s | | 1.3ft | 4s | | 17 24 mph | | Brief Showers | 52°f | 25% |
| | Noon | 1-2ft | | | 0.8ft | 13s | 278.07° | 0.9ft | 7s | | 1ft | 4s | | 17 24 mph | | Brief Showers | 52°f | 32% |
| | 3pm | 2ft | | | 1.2ft | 13s | 278.07° | 0.9ft | 7s | | 0.9ft | 4s | | 17 24 mph | | Brief Showers | 52°f | 32% |
| | 6pm | 2-3ft | | | 1.5ft | 15s | 277.49° | 1.4ft | 12s | | 1.4ft | 3s | | 17 24 mph | | Brief Showers | 52°f | 26% |
| | 9pm | 3-5ft | | | 3ft | 15s | 276.92° | 1.6ft | 3s | | 0.2ft | 14s | | 8 9 mph | | Mostly Clear | 50°f | 26% |
| Low | 1:27AM | 1.5ft | | High | 7:23AM | 23.6ft | | Low | 1:49PM | 2.1ft | | High | 7:47PM | 24ft | | First Light | 4:34AM | | Sunrise | 5:16AM | | Sunset | 9:19PM | | Last Light | 10:02PM | |
| Tue 05/28 | 12am | 3-5ft | | | 3ft | 14s | 276.35° | 1.4ft | 4s | | 0.2ft | 13s | | 17 21 mph | | Brief Showers | 52°f | 24% |