The fishing in the Florida Keys is consistent year round, so no matter when you come, there will be a variety of fish that can be caught. Having said that, there are certain times of the year that stand out for some of the more popular fish of the Florida Keys.
Fishing Marathon, Florida in the Spring
| Month | Avg. Air Temps °F (Hi/Lo) |
| March | 80° / 69° |
| April | 84° / 73° |
| May | 87° / 77° |
In the spring, the fishing is good for a variety of fish species. The temperatures are mild and they warm up nicely as spring progresses. The tarpon migration is what brings a lot of people to this area in the spring with good fishing running through April, May and part of June. Offshore, the pelagic species that hit their peak are blue marlin, yellowtail, wahoo and mahi mahi.
Fishing Marathon, Florida in the Summer
| Month | Avg. Air Temps °F (Hi/Lo) |
| June | 89° / 79° |
| July | 91° / 80° |
| August | 91° / 80° |
The water temperatures heat up in the summer, which means a lot of fishing charters are going to spend more time in offshore waters. Bottom fishing is popular for grouper and mangrove snapper with plenty of other species mixed in. Fishing charters target pelagic species such as mahi mahi, blackfin tuna, jacks and bonitas with some other fish mixed in too.
Fishing Marathon, Florida in the Fall
| Month | Avg. Air Temps °F (Hi/Lo) |
| September | 89° / 79° |
| October | 86° / 77° |
| November | 81° / 72° |
In the fall, the summer crowds are gone and this is the slowest time of the year in terms of anglers. However, the fishing is still amazing. Anglers can target a little bit of everything from backcountry fishing, the reefs and wrecks to offshore trolling for pelagic species.
Fishing Marathon, Florida in the Winter
| Month | Avg. Air Temps °F (Hi/Lo) |
| December | 78° / 68° |
| January | 76° / 65° |
| February | 78° / 67° |
The cooler winter months are mild and perfect for fishing whether you want to fish the morning, afternoon or evenings. The winter months do bring in some cold fronts and you will deal with more wind as well, but the fishing is still unbelievable all winter long. Some of the fish that hit their peak during the winter months are sailfish, tuna, wahoo, king mackerel, grouper and cobia. These are just some of the fish you will catch during the winter months.
