The average seasonal cycle of mean sea level. The values are in meters. Column values are the Month, Relative Sea Level, Upper 95% Confidence Interval, and Lower 95% Confidence Interval. Product of NOAA’s National Ocean Service / Center for Operational Oceanographic Products and Services (CO-OPS) Month Water Level Upper95% Lower95% 1 -0.008 0.008 -0.024 2 0.015 0.030 -0.000 3 0.038 0.053 0.023 4 0.033 0.049 0.018 5 0.035 0.051 0.020 6 0.025 0.041 0.010 7 0.015 0.030 -0.000 8 -0.013 0.003 -0.028 9 -0.032 -0.017 -0.047 10 -0.055 -0.040 -0.070 11 -0.033 -0.017 -0.048 12 -0.021 -0.006 -0.037