| 2021 | Aquabike | Aquabike International Ordinary | Aquabike International Ordinary – Runabout GP1 , Aquabike International Ordinary – Runabout GP2 , Aquabike International Ordinary – Runabout GP4, Aquabike International Ordinary – Runabout Ladies GP4 , Aquabike International Ordinary – Runabout Veterans , Aquabike International Ordinary – Ski division GP1 , Aquabike International Ordinary – Ski division GP2 , Aquabike International Ordinary – Ski division GP3 , Aquabike International Ordinary – Ski division Veterans | United Arab Emirates | Abu Dhabi | 04/03 | 05/03 | Postponed / New date TBC |
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| 2021 | Special Event | Motosurf | UIM Motosurf World Cup | Croatia | Zadar | 16/04 | 18/04 | |
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| 2021 | Special Event | Motosurf | UIM MOTOSURF EUROPEAN CHAMPIONSHIP | Czech Republic | Lohta | 30/04 | 02/05 | |
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| 2021 | Aquabike | Aquabike World Series | Class Pro – Circuit – Runabout GP1 , Class Pro – Circuit – Ski Division GP1, Class Pro – Circuit – Ski Ladies GP1, Class Pro – Freestyle | TBA | Europe | 01/05 | 02/05 | |
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| 2021 | Circuit | Circuit Continental | GT30 | Poland | Trzcianka | 01/05 | 02/05 | |
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| 2021 | Circuit | Formula World | Formula 125, Formula 250, Formula 500 | Czech Republic | Jedovnice | 07/05 | 09/05 | |
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| 2021 | Aquabike | Aquabike World Series | Class Pro – Circuit – Runabout GP1 , Class Pro – Circuit – Ski Division GP1, Class Pro – Circuit – Ski Ladies GP1, Class Pro – Freestyle | TBA | Europe | 08/05 | 09/05 | |
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| 2021 | Circuit | Formula World | Formula 1 | Italy | TBA | 14/05 | 16/05 | |
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| 2021 | Offshore | Offshore World Series | Class 1 | United States | Cocoa Beach (FL) | 20/05 | 23/05 | |
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| 2021 | Aquabike | Aquabike International Ordinary | Aquabike International Ordinary – Runabout GP1 , Aquabike International Ordinary – Runabout GP2 , Aquabike International Ordinary – Runabout GP4, Aquabike International Ordinary – Runabout Ladies GP4 , Aquabike International Ordinary – Ski division GP1 , Aquabike International Ordinary – Ski division GP2 , Aquabike International Ordinary – Ski division GP3 , Aquabike International Ordinary – Ski Ladies GP1 | Croatia | Fazana | 21/05 | 23/05 | |
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| 2021 | Circuit | Circuit World | River Marathon Jet Boat Class A, River Marathon Jet Boat Class CX, River Marathon Jet Boat Class FX, River Marathon Jet Boat Class Unlimited, River Marathon Jet Boat Overall | United States | Gold Beach (Oregon) - St Maries (Idaho) | 21/05 | 30/05 | Cancelled due to Covid-19 situation |
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| 2021 | Special Event | Motosurf | UIM MOTOSURF EUROPEAN CHAMPIONSHIP | Czech Republic | Treboutice | 21/05 | 23/05 | |
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| 2021 | Circuit | Circuit International Ordinary | Formula 4, GT15, GT30 | Finland | Lohja | 22/05 | 23/05 | |
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| 2021 | Circuit | Formula Continental | Formula 2 | Italy | Ponte Tresa | 22/05 | 23/05 | |
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| 2021 | Circuit | Formula World | Formula 2 | Portugal | Vila Velha de Ródão | 04/06 | 06/06 | |
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| 2021 | Special Event | Motosurf | UIM Motosurf World Cup | Czech Republic | Jedovnice | 04/06 | 06/06 | |
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| 2021 | Circuit | Formula World | Formula 2 | Portugal | Baião (Ribadouro) | 11/06 | 13/06 | |
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| 2021 | Circuit | Formula World | Formula 125, Formula 250, Formula 500 | Italy | Boretto | 11/06 | 13/06 | |
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| 2021 | Circuit | Circuit Continental | GT15 | Finland | Rauma | 12/06 | 13/06 | |
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| 2021 | Circuit | Circuit International Ordinary | Formula 4, GT30 | Finland | Rauma | 12/06 | 13/06 | |
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| 2021 | Offshore | Offshore World | Class 3A, Class 3B, Class 3J, Class 3X | Great Britain | Torquay | 17/06 | 21/06 | |
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| 2021 | Special Event | Motosurf | UIM MOTOSURF EUROPEAN CHAMPIONSHIP | Czech Republic | Hradec Králové | 25/06 | 27/06 | |
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| 2021 | Offshore | Offshore World Series | Class 1 | United States | Sarasota (FL) | 26/06 | 28/06 | |
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| 2021 | Circuit | Formula Continental | Formula 250, Formula 500 | Poland | Chodziez | 26/06 | 27/06 | |
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| 2021 | Aquabike | Aquabike World Series | Class Pro – Circuit – Runabout GP1 , Class Pro – Circuit – Ski Division GP1, Class Pro – Circuit – Ski Ladies GP1, Class Pro – Freestyle | TBA | Asia - July 2021 | 01/07 | 31/07 | To be announced |
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| 2021 | Offshore | Offshore World | Class 3D | Italy | Rodi | 02/07 | 05/07 | |
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| 2021 | Circuit | Formula Continental | Formula R1000 | Germany | Berlin-Grunau | 02/07 | 04/07 | |
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| 2021 | Circuit | Formula World | Formula 4 | Italy | Brindisi | 02/07 | 04/07 | |
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| 2021 | Circuit | Formula World | Formula 2 | Italy | Brindisi | 02/07 | 04/07 | |
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| 2021 | Aquabike | Aquabike Continental Series | Class Pro – Circuit – Runabout GP1, Class Pro – Circuit – Runabout GP2, Class Pro – Circuit – Runabout GP4, Class Pro – Circuit – Runabout Ladies GP4, Class Pro – Circuit – Runabout Veterans GP1, Class Pro - Circuit - Ski Division GP1, Class Pro - Circuit - Ski Division GP2, Class Pro - Circuit - Ski Division GP3, Class Pro – Circuit – Ski Juniors GP3.2, Class Pro – Circuit – Ski Juniors GP3.3, Class Pro - Circuit - Ski Ladies GP1, Class Pro - Circuit - Ski Veterans GP1, Class Pro – Freestyle | Poland | TBA | 03/07 | 04/07 | |
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