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Become a complete martial artists.

About Us

Qualified Instructors

Led by head coach and 7 time Martial Arts Hall of Fame Inductee Daniel Semeraro Jr.

Versatile Programs

Thunder Martial arts offers various styles including kickboxing, boxing,  BJJ, catch wrestling, Sambo,  and the traditional art No Kai Oi.

Our Philosophy

Beginner, Intermediate and Expert level martial artists are all welcome. We want to help you get to the next level.

Weekly Classes

Sunday

Open Mat

12:00 pm - 3:00 pm

+ Event Details

Sunday

Open Mat


12:00 pm - 3:00 pm

Mon-Thu

Kids No Kai Oi, Adult No Kai Oi, Grappling, Striking, Pro Class

5:00 pm - 9:30 pm

+ Event Details

Mon-Thu

Kids No Kai Oi, Adult No Kai Oi, Grappling, Striking, Pro Class

No Kai Oi is 45 minutes; Following classes are an hour starting at 6:30pm

5:00 pm - 9:30 pm

Friday

Kids Wrestling, Sambo

6:30 pm - 8:30 pm

+ Event Details

Friday

Kids Wrestling, Sambo

Kids wrestling is 45 minutes, Sambo is one hour starting at 7:30pm

6:30 pm - 8:30 pm

Saturday

Kids Boxing, Adult Boxing, *Women's Self Defense

9 am - 11:00 pm

*1pm start

+ Event Details

Saturday

Kids Boxing, Adult Boxing, *Women's Self Defense


9 am - 11:00 pm

*1pm start

Instructor

Daniel "Thunder" Semeraro Jr.

With 25 years of experience in the martial arts, Coach Dan has studied a wide variety of disciplines from stand up to ground fighting. Throughout the years he’s created an impressive track record. 


  • Undefeated New England KickBoxing Association MiddleWeight Champion.
  • Undefeated in MMA with a record of 6-0.
  •  Member of Chuck Norris's United Fighting Arts Federation.
  • Apart of the first class to participate in the Ultimate Black Belt Test, a 1-year test in which only 30 people nationwide were accepted.


He also holds a black belt each discipline:

  • 5th degree No Ka Oi
  • 3rd degree Chun Kuk Do
  • 4th degree Uchin No Michi Ryu Jujitsu
  • 4th degree Kessllite Ochimai Chie do
  • 2nd Degree Kun Tao
  • Brazilian Jiu-Jitsu 
  • 5th Degree Kajunkenbo

Awards 

  • United States Martial Arts Hall of Fame 
  • 2003 - Instructor of the year 
  • 2004 - Outstanding Martial Artist of the Year 
  • 2005 - Full Contact Fighter of the Year 
  • 2007 - MMA Instructor of the Year 
  • 2008 - Master 
  • 2009 - Excellence in Teaching and Leadership 
  • World Karate Union Hall of Fame 
  • 2009 - Coach of the Year (Team Thunder)

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Thunder Martial Arts Academy

30 Echo Lake Road, Watertown, Connecticut 06795, United States

(203) 909 6464

Hours

Monday - Thursday: 4:30pm - 9pm

Saturday, Sunday: 9am - 2pm