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In September 2027, the highest tide in San Juan is on September 30 at 8:40 AM (1.8 ft) and the lowest on September 22 at 6:05 AM (−0.1 ft). The biggest range of the month, 1.6 ft, is on September 4; the smallest, 1.0 ft, on September 15.
Which days in September have the biggest tides in San Juan?
Range of each day, coloured by spring and neap tides
Calendar
High and low tides in San Juan, September 2027
🖨 Print or PDF| Day | High ▲ and low ▼ tide | Range | Moon | Sun |
|---|---|---|---|---|
| ▼2:46 AM 0.2 ft▲8:49 AM 1.5 ft▼3:03 PM 0.0 ft▲9:24 PM 1.6 ft | 1.5 | 6:11 AM · 6:40 PM | ||
| ▼3:28 AM 0.2 ft▲9:47 AM 1.7 ft▼4:03 PM 0.1 ft▲10:09 PM 1.4 ft | 1.5 | 6:11 AM · 6:40 PM | ||
| ▼4:10 AM 0.1 ft▲10:44 AM 1.7 ft▼5:03 PM 0.2 ft▲10:52 PM 1.3 ft | 1.6 | 6:11 AM · 6:39 PM | ||
| ▼4:52 AM 0.0 ft▲11:40 AM 1.7 ft▼6:04 PM 0.3 ft▲11:34 PM 1.1 ft | 1.6 | 6:11 AM · 6:38 PM | ||
| ▼5:34 AM 0.0 ft▲12:37 PM 1.6 ft▼7:06 PM 0.4 ft | 1.6 | 6:11 AM · 6:37 PM | ||
| ▲12:15 AM 1.0 ft▼6:18 AM 0.0 ft▲1:36 PM 1.6 ft▼8:12 PM 0.5 ft | 1.5 | 6:12 AM · 6:36 PM | ||
| ▲12:59 AM 0.8 ft▼7:05 AM 0.0 ft▲2:36 PM 1.5 ft▼9:21 PM 0.5 ft | 1.5 | 6:12 AM · 6:35 PM | ||
| ▲1:48 AM 0.8 ft▼7:57 AM 0.1 ft▲3:36 PM 1.5 ft▼10:28 PM 0.5 ft | 1.4 | 6:12 AM · 6:35 PM | ||
| ▲2:49 AM 0.7 ft▼8:54 AM 0.1 ft▲4:34 PM 1.4 ft▼11:25 PM 0.5 ft | 1.3 | 6:12 AM · 6:34 PM | ||
| ▲3:57 AM 0.8 ft▼9:56 AM 0.2 ft▲5:27 PM 1.4 ft | 1.2 | 6:12 AM · 6:33 PM | ||
| ▼12:10 AM 0.5 ft▲5:04 AM 0.8 ft▼10:57 AM 0.2 ft▲6:14 PM 1.4 ft | 1.2 | 6:12 AM · 6:32 PM | ||
| ▼12:48 AM 0.5 ft▲6:01 AM 0.9 ft▼11:54 AM 0.2 ft▲6:56 PM 1.4 ft | 1.2 | 6:13 AM · 6:31 PM | ||
| ▼1:21 AM 0.4 ft▲6:51 AM 1.0 ft▼12:47 PM 0.2 ft▲7:33 PM 1.4 ft | 1.1 | 6:13 AM · 6:30 PM | ||
| ▼1:51 AM 0.4 ft▲7:35 AM 1.1 ft▼1:35 PM 0.3 ft▲8:06 PM 1.4 ft | 1.1 | 6:13 AM · 6:29 PM | ||
| ▼2:18 AM 0.4 ft▲8:14 AM 1.2 ft▼2:20 PM 0.3 ft▲8:36 PM 1.3 ft | 1.0 | 6:13 AM · 6:28 PM | ||
| ▼2:43 AM 0.3 ft▲8:53 AM 1.3 ft▼3:04 PM 0.3 ft▲9:03 PM 1.3 ft | 1.0 | 6:13 AM · 6:28 PM | ||
| ▼3:08 AM 0.3 ft▲9:32 AM 1.4 ft▼3:48 PM 0.4 ft▲9:30 PM 1.2 ft | 1.1 | 6:13 AM · 6:27 PM | ||
| ▼3:34 AM 0.2 ft▲10:13 AM 1.5 ft▼4:34 PM 0.4 ft▲9:57 PM 1.1 ft | 1.3 | 6:13 AM · 6:26 PM | ||
| ▼4:04 AM 0.1 ft▲10:58 AM 1.6 ft▼5:23 PM 0.5 ft▲10:27 PM 1.0 ft | 1.4 | 6:14 AM · 6:25 PM | ||
| ▼4:38 AM 0.0 ft▲11:47 AM 1.6 ft▼6:17 PM 0.5 ft▲11:01 PM 0.9 ft | 1.5 | 6:14 AM · 6:24 PM | ||
| ▼5:18 AM 0.0 ft▲12:40 PM 1.6 ft▼7:16 PM 0.6 ft▲11:42 PM 0.9 ft | 1.6 | 6:14 AM · 6:23 PM | ||
| ▼6:05 AM −0.1 ft▲1:39 PM 1.6 ft▼8:20 PM 0.6 ft | 1.6 | 6:14 AM · 6:22 PM | ||
| ▲12:37 AM 0.8 ft▼7:02 AM −0.1 ft▲2:40 PM 1.6 ft▼9:24 PM 0.6 ft | 1.6 | 6:14 AM · 6:21 PM | ||
| ▲1:48 AM 0.8 ft▼8:08 AM 0.0 ft▲3:43 PM 1.6 ft▼10:22 PM 0.5 ft | 1.6 | 6:14 AM · 6:20 PM | ||
| ▲3:10 AM 0.9 ft▼9:22 AM 0.0 ft▲4:43 PM 1.6 ft▼11:12 PM 0.5 ft | 1.5 | 6:15 AM · 6:20 PM | ||
| ▲4:30 AM 1.1 ft▼10:38 AM 0.1 ft▲5:39 PM 1.6 ft▼11:57 PM 0.4 ft | 1.5 | 6:15 AM · 6:19 PM | ||
| ▲5:42 AM 1.3 ft▼11:51 AM 0.1 ft▲6:31 PM 1.6 ft | 1.4 | 6:15 AM · 6:18 PM | ||
| ▼12:40 AM 0.3 ft▲6:45 AM 1.5 ft▼1:00 PM 0.1 ft▲7:20 PM 1.5 ft | 1.3 | 6:15 AM · 6:17 PM | ||
| ▼1:23 AM 0.2 ft▲7:44 AM 1.6 ft▼2:03 PM 0.1 ft▲8:07 PM 1.4 ft | 1.5 | 6:15 AM · 6:16 PM | ||
| ▼2:05 AM 0.1 ft▲8:40 AM 1.8 ft▼3:04 PM 0.2 ft▲8:52 PM 1.3 ft | 1.6 | 6:15 AM · 6:15 PM |
Frequently asked questions
When is the highest tide in San Juan in September 2027?
On September 30 at 8:40 AM, 1.8 ft above mean lower low water (MLLW).
When is the lowest tide in San Juan in September 2027?
On September 22 at 6:05 AM, −0.1 ft.
Which days in September 2027 have spring tides in San Juan?
No spring tides in San Juan in September 2027.
Where does this data come from?
These tides are an astronomical prediction computed by the Tides Pro engine with tide models and harmonic constants, checked against the official predictions of NOAA. How we validate them is in our methodology. Heights are above mean lower low water (MLLW). They do not include wind or air pressure: for navigation, use official publications.
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