Tides will be again extreme next week as the full moon, a Blue Moon, will be close. We had extreme tides not long ago in the week following Christmas.

Full Moon is Wednesday, January 31.

Coincidentally, the moon will also be in perigee on Jan. 30 which means it will be closer than usual. Our tides are caused by the gravitational pull of both the moon and sun; we get an especially bigger pull next week.

Tides will run higher and lower than normal for most of next week. The tides will be highest midday and around midnight. Low tide will take place around sunrise and sunset.

A blue moon is the second full moon in the month. It doesn’t happen often, but astronomers have done the math and they report two full moons in a calendar month happens about every two and a half years.

What makes this event a little more blue, or a little more interesting is that it is far more rare to have a Blue Moon that is in perigee.

Astronomers estimate that the moon will be 223,068 miles away. It will not be as close as it was a month ago. That proximity means that our tides will be more noticeable. You may not notice much of a size difference in the moon, but you’ll notice the change in tides.