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USGS Daily Statistics for the Nation

The statistics generated from this site are based on approved daily-mean data and may not match those published by the USGS in official publications. The user is responsible for assessment and use of statistics from this site. For more details on why the statistics may not match, click here.

USGS 11042000 SAN LUIS REY R A OCEANSIDE CA


San Diego County, California
Hydrologic Unit Code 18070303
Latitude  33°13'05", Longitude 117°21'34" NAD27
Drainage area 557  square miles
Gage datum 8.90 feet above NAVD88
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00060, Discharge, cubic feet per second,
Day of
month		 Mean of daily mean values for each day for water year of record in, ft3/s   (Calculation Period 1929-10-01 -> 2025-09-30)

Calculation period restricted by USGS staff due to special conditions at/near site
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1 27 54 182 75 38 17 9 4.4 4.2 4.7 4.4 15
2 24 47 185 75 35 17 9 4.4 4.1 4.3 4.1 9.1
3 24 48 276 62 33 16 8.9 4.5 3.9 3 3.9 9.6
4 36 49 127 59 33 15 8.7 4.4 3.8 2.5 3.8 10
5 54 48 167 58 34 16 8.6 4.2 3.7 2.4 3.7 10
6 64 63 186 57 34 15 8.5 4.3 3.7 2.5 3.8 12
7 51 142 107 57 32 15 8.2 4.2 3.7 2.6 3.8 30
8 64 71 99 59 31 14 8 4.2 3.6 2.7 4.3 11
9 54 83 94 49 30 14 7.7 4.2 3.5 2.5 4.7 10
10 161 69 91 68 29 14 7.5 4.2 2.4 2.6 5.1 10
11 176 67 132 87 28 13 7.4 4.1 2.2 2.6 5.8 12
12 93 57 113 58 26 13 7.3 4.1 2.2 2.9 11 13
13 54 62 104 53 28 13 6.9 4.2 2.1 2.8 12 12
14 41 135 100 50 26 13 5.9 4.1 2.1 2.7 8.7 11
15 59 180 104 49 24 12 4.5 4.1 2.1 2.6 7.1 11
16 64 131 145 49 23 12 4.1 4.2 2.1 2.7 6.5 12
17 82 122 111 46 22 11 4.3 5.4 2.1 2.9 6.1 21
18 46 155 133 46 22 11 5.5 4.7 2.1 3 6.9 27
19 42 103 110 44 22 11 5.2 4.6 2 3 6.2 31
20 35 127 86 44 22 11 4.9 4.7 2.1 4.4 6.9 23
21 45 175 101 46 21 11 3.6 5.6 2.1 6 9 20
22 51 113 102 44 21 10 3.5 5.4 2.2 5.9 10 69
23 54 119 91 41 20 10 3.9 5 2.2 4.6 11 50
24 46 98 97 39 20 9.9 4.5 4.9 2.4 4.3 7.4 36
25 44 97 79 37 20 9.7 4.5 4.7 2.5 3.9 17 44
26 51 110 73 37 20 9.5 4.5 4.6 2.5 3.6 9.9 29
27 43 79 93 37 19 9.4 4.5 4.6 2.5 7.1 7.6 25
28 43 112 111 37 19 9.3 4.4 4.4 2.4 9.5 7.8 24
29 104 85 86 38 18 9.4 4.4 4.4 2.4 8.5 9.2 27
30 65   73 39 18 9.2 4.4 4.2 2.4 6.2 16 34
31 65   66   17   4.5 4.2   5   36